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update iptables to 1.4.0 (2.6 kernels only), refresh kernel patches 

SVN-Revision: 10843
owl
Gabor Juhos 2008-04-15 06:11:23 +00:00
parent ece27874c1
commit d80f43d15f
37 changed files with 5431 additions and 3580 deletions
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4
include/netfilter.mk
View File

@ -100,6 +100,7 @@ $(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_STATISTIC, $(P_XT)xt_st
$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_TCPMSS, $(P_V4)ipt_tcpmss))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_TCPMSS, $(P_XT)xt_tcpmss))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_TIME, $(P_V4)ipt_time))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_TIME, $(P_XT)xt_time))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_TOS, $(P_V4)ipt_tos))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_TTL, $(P_V4)ipt_ttl))
$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_UNCLEAN, $(P_V4)ipt_unclean))
@ -249,6 +250,9 @@ $(eval $(call nf_add,IPT_ULOG,CONFIG_IP_NF_TARGET_ULOG, $(P_V4)ipt_ULOG))
IPT_BUILTIN := $(if $(NF_KMOD),,$(P_V4)ipt_standard)
IPT_BUILTIN += $(if $(NF_KMOD),,$(P_V4)ipt_icmp $(P_V4)ipt_tcp $(P_V4)ipt_udp)
IPT_BUILTIN += $(if $(NF_KMOD),,$(P_XT)xt_standard)
IPT_BUILTIN += $(if $(NF_KMOD),,$(P_XT)xt_icmp $(P_XT)xt_tcp $(P_XT)xt_udp)
IPT_BUILTIN += $(IPT_CONNTRACK-y)
IPT_BUILTIN += $(IPT_EXTRA-y)
IPT_BUILTIN += $(IPT_FILTER-y)

104
package/iptables/Makefile
View File

@ -1,5 +1,5 @@
#
# Copyright (C) 2006 OpenWrt.org
#
# Copyright (C) 2006-2008 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@ -10,15 +10,28 @@ include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=iptables
PKG_VERSION:=1.3.8
PKG_RELEASE:=2
ifeq ($(CONFIG_LINUX_2_4),y)
PKG_VERSION:=1.3.8
PKG_RELEASE:=3
PKG_MD5SUM:=0a9209f928002e5eee9cdff8fef4d4b3
endif
ifeq ($(CONFIG_LINUX_2_6),y)
PKG_VERSION:=1.4.0
PKG_RELEASE:=1
PKG_MD5SUM:=90cfa8a554a29b0b859a625e701af2a7
endif
PKG_VERSION?=<IPTABLES_VERSION>
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=http://www.netfilter.org/projects/iptables/files \
ftp://ftp.be.netfilter.org/pub/netfilter/iptables/ \
ftp://ftp.de.netfilter.org/pub/netfilter/iptables/ \
ftp://ftp.no.netfilter.org/pub/netfilter/iptables/
PKG_MD5SUM:=0a9209f928002e5eee9cdff8fef4d4b3
PATCH_DIR:=./patches/$(PKG_VERSION)
include $(INCLUDE_DIR)/package.mk
ifeq ($(DUMP),)
@ -33,6 +46,11 @@ define Package/iptables/Default
URL:=http://netfilter.org/
endef
define Package/iptables/Module
$(call Package/iptables/Default)
DEPENDS:=iptables $(1)
endef
define Package/iptables
$(call Package/iptables/Default)
TITLE:=IPv4 firewall administration tool
@ -45,8 +63,7 @@ define Package/iptables/conffiles
endef
define Package/iptables-mod-conntrack
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-conntrack
$(call Package/iptables/Module, +kmod-ipt-conntrack)
TITLE:=connection tracking modules
endef
@ -59,39 +76,36 @@ define Package/iptables-mod-conntrack/description
endef
define Package/iptables-mod-filter
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-filter
$(call Package/iptables/Module, +kmod-ipt-filter)
TITLE:=filter modules
endef
define Package/iptables-mod-filter/description
iptables extensions for packet content inspection.
Includes:
Includes:
- libipt_ipp2p
- libipt_layer7
- libipt_layer7
endef
define Package/iptables-mod-imq
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-imq
$(call Package/iptables/Module, +kmod-ipt-imq)
TITLE:=IMQ support
endef
define Package/iptables-mod-imq/description
iptables extension for IMQ support.
Includes:
Includes:
- libipt_IMQ
endef
define Package/iptables-mod-ipopt
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-ipopt
$(call Package/iptables/Module, +kmod-ipt-ipopt)
TITLE:=IP/Packet option modules
endef
define Package/iptables-mod-ipopt/description
iptables extensions for matching/changing IP packet options.\\\
Includes:
Includes:
- libipt_CLASSIFY
- libipt_dscp/DSCP
- libipt_ecn/ECN
@ -102,68 +116,63 @@ define Package/iptables-mod-ipopt/description
- libipt_tcpmms
- libipt_tos/TOS
- libipt_ttl/TTL
- libipt_unclean
- libipt_unclean
endef
define Package/iptables-mod-ipsec
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-ipsec
$(call Package/iptables/Module, +kmod-ipt-ipsec)
TITLE:=IPSec extensions
endef
define Package/iptables-mod-ipsec/description
iptables extensions for matching ipsec traffic.
Includes:
Includes:
- libipt_ah
- libipt_esp
- libipt_policy
endef
define Package/iptables-mod-nat
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-nat
$(call Package/iptables/Module, +kmod-ipt-nat)
TITLE:=extra NAT targets
endef
define Package/iptables-mod-nat/description
iptables extensions for different NAT targets.
Includes:
Includes:
- libipt_REDIRECT
endef
define Package/iptables-mod-ulog
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-ulog
$(call Package/iptables/Module, +kmod-ipt-ulog)
TITLE:=user-space packet logging
endef
define Package/iptables-mod-ulog/description
iptables extensions for user-space packet logging.
Includes:
Includes:
- libipt_ULOG
endef
define Package/iptables-mod-iprange
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-iprange
$(call Package/iptables/Module, +kmod-ipt-iprange)
TITLE:=ip range module
endef
define Package/iptables-mod-iprange/description
iptables extensions for matching ip ranges.
Includes:
Includes:
- libipt_iprange
endef
define Package/iptables-mod-extra
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-extra
$(call Package/iptables/Module, +kmod-ipt-extra)
TITLE:=other extra iptables extensions
endef
define Package/iptables-mod-extra/description
other extra iptables extensions.
Includes:
Includes:
- libipt_limit
- libipt_owner
- libipt_physdev
@ -177,37 +186,36 @@ define Package/iptables-mod-extra/description
endef
define Package/iptables-mod-ipset
$(call Package/iptables/Default)
DEPENDS:=iptables +kmod-ipt-ipset
$(call Package/iptables/Module, +kmod-ipt-ipset)
TITLE:=ipset iptables extension
endef
define Package/iptables-utils
$(call Package/iptables/Default)
DEPENDS:=iptables
$(call Package/iptables/Module, )
TITLE:=iptables save and restore utilities
endef
define Package/ip6tables
$(call Package/iptables/Default)
DEPENDS:=+kmod-ipv6
CATEGORY:=Network
DEPENDS:=+kmod-ip6tables
CATEGORY:=IPv6
TITLE:=IPv6 firewall administration tool
MENU:=1
endef
define Package/ip6tables-utils
$(call Package/iptables/Default)
DEPENDS:=ip6tables
CATEGORY:=Network
CATEGORY:=IPv6
TITLE:=ip6tables save and restore utilities
endef
define Build/Prepare
$(call Build/Prepare/Default)
chmod a+x $(PKG_BUILD_DIR)/extensions/.*-test*
endef
define Build/Configure
chmod a+x $(PKG_BUILD_DIR)/extensions/.*-test*
rm -f $(PKG_BUILD_DIR)/.configured*
$(MAKE) -C $(PKG_BUILD_DIR) \
clean
@ -220,6 +228,7 @@ define Build/Compile
COPT_FLAGS="$(TARGET_CFLAGS)" \
LDFLAGS="-rdynamic -static-libgcc" \
KERNEL_DIR="$(LINUX_DIR)" PREFIX=/usr \
KBUILD_OUTPUT="$(LINUX_DIR)" \
DESTDIR="$(PKG_INSTALL_DIR)" \
all experimental install install-experimental
endef
@ -229,6 +238,7 @@ define Build/InstallDev
$(TARGET_CONFIGURE_OPTS) \
COPT_FLAGS="$(TARGET_CFLAGS)" \
KERNEL_DIR="$(LINUX_DIR)" PREFIX=/usr \
KBUILD_OUTPUT="$(LINUX_DIR)" \
DESTDIR="$(1)" \
install-devel
$(CP) $(PKG_BUILD_DIR)/include $(1)/usr
@ -247,7 +257,11 @@ define Package/iptables/install
$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/sbin/iptables $(1)/usr/sbin/
$(INSTALL_DIR) $(1)/usr/lib/iptables
(cd $(PKG_INSTALL_DIR)/usr/lib/iptables ; \
$(CP) $(patsubst %,lib%.so,$(IPT_BUILTIN:xt_%=ipt_%)) $(1)/usr/lib/iptables/ \
for m in $(patsubst xt_%,ipt_%,$(IPT_BUILTIN)) $(patsubst ipt_%,xt_%,$(IPT_BUILTIN)); do \
if [ -f $(PKG_INSTALL_DIR)/usr/lib/iptables/lib$$$${m}.so ]; then \
$(CP) $(PKG_INSTALL_DIR)/usr/lib/iptables/lib$$$${m}.so $(1)/usr/lib/iptables/ ;\
fi; \
done \
)
endef
@ -273,8 +287,10 @@ endef
define BuildPlugin
define Package/$(1)/install
$(INSTALL_DIR) $$(1)/usr/lib/iptables
for m in $$(patsubst xt_%,ipt_%,$(2)); do \
$(CP) $(PKG_INSTALL_DIR)/usr/lib/iptables/lib$$$$$$$${m}.so $$(1)/usr/lib/iptables/ ; \
for m in $(patsubst xt_%,ipt_%,$(2)) $(patsubst ipt_%,xt_%,$(2)); do \
if [ -f $(PKG_INSTALL_DIR)/usr/lib/iptables/lib$$$$$$$${m}.so ]; then \
$(CP) $(PKG_INSTALL_DIR)/usr/lib/iptables/lib$$$$$$$${m}.so $$(1)/usr/lib/iptables/ ; \
fi; \
done
$(3)
endef

342
package/iptables/patches/008-chaostables.patch
View File

@ -1,342 +0,0 @@
Index: iptables-1.3.8/extensions/.CHAOS-test
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.CHAOS-test 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,2 @@
+#!/bin/sh
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_CHAOS.h" ] && echo "CHAOS";
Index: iptables-1.3.8/extensions/.DELUDE-test
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.DELUDE-test 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,2 @@
+#!/bin/sh
+echo "DELUDE";
Index: iptables-1.3.8/extensions/libipt_CHAOS.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_CHAOS.c 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,111 @@
+/*
+ CHAOS target for iptables
+
+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+ released under the terms of the GNU General Public
+ License version 2.x and only versions 2.x.
+*/
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/xt_CHAOS.h>
+
+static void libipt_chaos_help(void)
+{
+ printf(
+ "CHAOS target v%s options:\n"
+ " --delude Enable DELUDE processing for TCP\n"
+ " --tarpit Enable TARPIT processing for TCP\n",
+ IPTABLES_VERSION);
+ return;
+}
+
+static int libipt_chaos_parse(int c, char **argv, int invert,
+ unsigned int *flags, const struct ipt_entry *entry,
+ struct ipt_entry_target **target)
+{
+ struct xt_chaos_info *info = (void *)((*target)->data);
+ switch(c) {
+ case 'd':
+ info->variant = XTCHAOS_DELUDE;
+ *flags |= 0x02;
+ return 1;
+ case 't':
+ info->variant = XTCHAOS_TARPIT;
+ *flags |= 0x01;
+ return 1;
+ }
+ return 0;
+}
+
+static void libipt_chaos_check(unsigned int flags)
+{
+ if(flags != 0x03)
+ return;
+ /* If flags == 0x03, both were specified, which should not be. */
+ exit_error(PARAMETER_PROBLEM,
+ "CHAOS: only one of --tarpit or --delude may be specified");
+ return;
+}
+
+static void libipt_chaos_print(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target, int numeric)
+{
+ const struct xt_chaos_info *info = (const void *)target->data;
+ switch(info->variant) {
+ case XTCHAOS_DELUDE:
+ printf("DELUDE ");
+ break;
+ case XTCHAOS_TARPIT:
+ printf("TARPIT ");
+ break;
+ default:
+ break;
+ }
+ return;
+}
+
+static void libipt_chaos_save(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target)
+{
+ const struct xt_chaos_info *info = (const void *)target->data;
+ switch(info->variant) {
+ case XTCHAOS_DELUDE:
+ printf("--delude ");
+ break;
+ case XTCHAOS_TARPIT:
+ printf("--tarpit ");
+ break;
+ default:
+ break;
+ }
+ return;
+}
+
+static struct option libipt_chaos_opts[] = {
+ {"delude", 0, NULL, 'd'},
+ {"tarpit", 0, NULL, 't'},
+ {NULL},
+};
+
+static struct iptables_target libipt_chaos_info = {
+ .name = "CHAOS",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(sizeof(struct xt_chaos_info)),
+ .userspacesize = IPT_ALIGN(sizeof(struct xt_chaos_info)),
+ .help = libipt_chaos_help,
+ .parse = libipt_chaos_parse,
+ .final_check = libipt_chaos_check,
+ .print = libipt_chaos_print,
+ .save = libipt_chaos_save,
+ .extra_opts = libipt_chaos_opts,
+};
+
+static __attribute__((constructor)) void libipt_chaos_init(void)
+{
+ register_target(&libipt_chaos_info);
+ return;
+}
Index: iptables-1.3.8/extensions/libipt_DELUDE.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_DELUDE.c 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,66 @@
+/*
+ DELUDE target for iptables
+
+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+ released under the terms of the GNU General Public
+ License version 2.x and only versions 2.x.
+*/
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+static void libipt_delude_help(void)
+{
+ printf("DELUDE takes no options\n");
+ return;
+}
+
+static int libipt_delude_parse(int c, char **argv, int invert,
+ unsigned int *flags, const struct ipt_entry *entry,
+ struct ipt_entry_target **target)
+{
+ return 0;
+}
+
+static void libipt_delude_check(unsigned int flags)
+{
+ return;
+}
+
+static void libipt_delude_print(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target, int numeric)
+{
+ return;
+}
+
+static void libipt_delude_save(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target)
+{
+ return;
+}
+
+static struct option libipt_delude_opts[] = {
+ {NULL},
+};
+
+static struct iptables_target libipt_delude_info = {
+ .name = "DELUDE",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(0),
+ .userspacesize = IPT_ALIGN(0),
+ .help = libipt_delude_help,
+ .parse = libipt_delude_parse,
+ .final_check = libipt_delude_check,
+ .print = libipt_delude_print,
+ .save = libipt_delude_save,
+ .extra_opts = libipt_delude_opts,
+};
+
+static __attribute__((constructor)) void libipt_delude_init(void)
+{
+ register_target(&libipt_delude_info);
+ return;
+}
Index: iptables-1.3.8/extensions/libipt_portscan.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_portscan.c 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,129 @@
+/*
+ portscan match for iptables
+
+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+ released under the terms of the GNU General Public
+ License version 2.x and only versions 2.x.
+*/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter/xt_portscan.h>
+
+static void libipt_portscan_help(void)
+{
+ printf(
+ "portscan match v%s options:\n"
+ "(Combining them will make them match by OR-logic)\n"
+ " --stealth Match TCP Stealth packets\n"
+ " --synscan Match TCP SYN scans\n"
+ " --cnscan Match TCP Connect scans\n"
+ " --grscan Match Banner Grabbing scans\n",
+ IPTABLES_VERSION);
+ return;
+}
+
+static void libipt_portscan_mtinit(struct ipt_entry_match *match,
+ unsigned int *nfcache)
+{
+ /* Cannot cache this */
+ *nfcache |= NFC_UNKNOWN;
+ return;
+}
+
+static int libipt_portscan_parse(int c, char **argv, int invert,
+ unsigned int *flags, const struct ipt_entry *entry, unsigned int *nfc,
+ struct ipt_entry_match **match)
+{
+ struct xt_portscan_info *info = (void *)((*match)->data);
+
+ switch(c) {
+ case 'c':
+ info->match_cn = 1;
+ return 1;
+ case 'g':
+ info->match_gr = 1;
+ return 1;
+ case 's':
+ info->match_syn = 1;
+ return 1;
+ case 'x':
+ info->match_stealth = 1;
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static void libipt_portscan_check(unsigned int flags)
+{
+ return;
+}
+
+static void libipt_portscan_print(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match, int numeric)
+{
+ const struct xt_portscan_info *info = (const void *)(match->data);
+ const char *s = "";
+
+ printf("portscan ");
+ if(info->match_stealth) {
+ printf("STEALTH");
+ s = ",";
+ }
+ if(info->match_syn) {
+ printf("%sSYNSCAN", s);
+ s = ",";
+ }
+ if(info->match_cn) {
+ printf("%sCNSCAN", s);
+ s = ",";
+ }
+ if(info->match_gr)
+ printf("%sGRSCAN", s);
+ printf(" ");
+ return;
+}
+
+static void libipt_portscan_save(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match)
+{
+ const struct xt_portscan_info *info = (const void *)(match->data);
+ if(info->match_stealth) printf("--stealth ");
+ if(info->match_syn) printf("--synscan ");
+ if(info->match_cn) printf("--cnscan ");
+ if(info->match_gr) printf("--grscan ");
+ return;
+}
+
+static struct option libipt_portscan_opts[] = {
+ {"stealth", 0, NULL, 'x'},
+ {"synscan", 0, NULL, 's'},
+ {"cnscan", 0, NULL, 'c'},
+ {"grscan", 0, NULL, 'g'},
+ {NULL},
+};
+
+static struct iptables_match libipt_portscan_info = {
+ .name = "portscan",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(sizeof(struct xt_portscan_info)),
+ .userspacesize = IPT_ALIGN(sizeof(struct xt_portscan_info)),
+ .help = libipt_portscan_help,
+ .init = libipt_portscan_mtinit,
+ .parse = libipt_portscan_parse,
+ .final_check = libipt_portscan_check,
+ .print = libipt_portscan_print,
+ .save = libipt_portscan_save,
+ .extra_opts = libipt_portscan_opts,
+};
+
+static __attribute__((constructor)) void libipt_portscan_init(void)
+{
+ register_match(&libipt_portscan_info);
+ return;
+}
Index: iptables-1.3.8/extensions/.portscan-test
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.portscan-test 2007-07-31 15:27:57.000000000 -0500
@@ -0,0 +1,2 @@
+#!/bin/sh
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_portscan.h" ] && echo "portscan";

106
package/iptables/patches/009-tarpit-support.patch
View File

@ -1,106 +0,0 @@
diff -N -u -r iptables-1.3.8-20070817/extensions/libipt_TARPIT.c iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.c
--- iptables-1.3.8-20070817/extensions/libipt_TARPIT.c 1969-12-31 19:00:00.000000000 -0500
+++ iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.c 2007-08-18 14:49:25.000000000 -0400
@@ -0,0 +1,58 @@
+/* Shared library add-on to iptables for TARPIT support */
+#include <stdio.h>
+#include <getopt.h>
+#include <iptables.h>
+
+static void
+help(void)
+{
+ fputs(
+"TARPIT takes no options\n"
+"\n", stdout);
+}
+
+static struct option opts[] = {
+ { 0 }
+};
+
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ struct ipt_entry_target **target)
+{
+ return 0;
+}
+
+static void final_check(unsigned int flags)
+{
+}
+
+static void
+print(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target,
+ int numeric)
+{
+}
+
+static void save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
+{
+}
+
+static struct iptables_target tarpit = {
+ .next = NULL,
+ .name = "TARPIT",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(0),
+ .userspacesize = IPT_ALIGN(0),
+ .help = &help,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+void _init(void)
+{
+ register_target(&tarpit);
+}
diff -N -u -r iptables-1.3.8-20070817/extensions/libipt_TARPIT.man iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.man
--- iptables-1.3.8-20070817/extensions/libipt_TARPIT.man 1969-12-31 19:00:00.000000000 -0500
+++ iptables-1.3.8-20070817-nf/extensions/libipt_TARPIT.man 2007-08-18 14:49:25.000000000 -0400
@@ -0,0 +1,34 @@
+Captures and holds incoming TCP connections using no local
+per-connection resources. Connections are accepted, but immediately
+switched to the persist state (0 byte window), in which the remote
+side stops sending data and asks to continue every 60-240 seconds.
+Attempts to close the connection are ignored, forcing the remote side
+to time out the connection in 12-24 minutes.
+
+This offers similar functionality to LaBrea
+<http://www.hackbusters.net/LaBrea/> but doesn't require dedicated
+hardware or IPs. Any TCP port that you would normally DROP or REJECT
+can instead become a tarpit.
+
+To tarpit connections to TCP port 80 destined for the current machine:
+.IP
+iptables -A INPUT -p tcp -m tcp --dport 80 -j TARPIT
+.P
+To significantly slow down Code Red/Nimda-style scans of unused address
+space, forward unused ip addresses to a Linux box not acting as a router
+(e.g. "ip route 10.0.0.0 255.0.0.0 ip.of.linux.box" on a Cisco), enable IP
+forwarding on the Linux box, and add:
+.IP
+iptables -A FORWARD -p tcp -j TARPIT
+.IP
+iptables -A FORWARD -j DROP
+.TP
+NOTE:
+If you use the conntrack module while you are using TARPIT, you should
+also use the NOTRACK target, or the kernel will unnecessarily allocate
+resources for each TARPITted connection. To TARPIT incoming
+connections to the standard IRC port while using conntrack, you could:
+.IP
+iptables -t raw -A PREROUTING -p tcp --dport 6667 -j NOTRACK
+.IP
+iptables -A INPUT -p tcp --dport 6667 -j TARPIT
diff -N -u -r iptables-1.3.8-20070817/extensions/.TARPIT-test iptables-1.3.8-20070817-nf/extensions/.TARPIT-test
--- iptables-1.3.8-20070817/extensions/.TARPIT-test 1969-12-31 19:00:00.000000000 -0500
+++ iptables-1.3.8-20070817-nf/extensions/.TARPIT-test 2007-08-18 14:49:25.000000000 -0400
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/net/netfilter/xt_TARPIT.c ] && echo TARPIT

14
package/iptables/patches/001-ipp2p-0.8.1rc1.patch → package/iptables/patches/1.3.8/001-ipp2p_0.8.1rc1.patch
View File

@ -1,8 +1,8 @@
Index: iptables-1.3.8/extensions/Makefile
===================================================================
--- iptables-1.3.8.orig/extensions/Makefile 2007-07-31 15:27:55.000000000 -0500
+++ iptables-1.3.8/extensions/Makefile 2007-07-31 15:27:55.000000000 -0500
@@ -13,6 +13,10 @@
--- iptables-1.3.8.orig/extensions/Makefile
+++ iptables-1.3.8/extensions/Makefile
@@ -13,6 +13,10 @@ PF_EXT_SE_SLIB:=SECMARK CONNSECMARK
PF6_EXT_SE_SLIB:=SECMARK CONNSECMARK
endif
@ -15,8 +15,8 @@ Index: iptables-1.3.8/extensions/Makefile
PF6_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-test6),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))
Index: iptables-1.3.8/extensions/libipt_ipp2p.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_ipp2p.c 2007-07-31 15:27:55.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/extensions/libipt_ipp2p.c
@@ -0,0 +1,401 @@
+
+#include <stdio.h>
@ -421,8 +421,8 @@ Index: iptables-1.3.8/extensions/libipt_ipp2p.c
+
Index: iptables-1.3.8/include/linux/netfilter_ipv4/ipt_ipp2p.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/include/linux/netfilter_ipv4/ipt_ipp2p.h 2007-07-31 15:27:55.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/include/linux/netfilter_ipv4/ipt_ipp2p.h
@@ -0,0 +1,31 @@
+#ifndef __IPT_IPP2P_H
+#define __IPT_IPP2P_H

118
package/iptables/patches/002-layer7-1.5nbd.patch → package/iptables/patches/1.3.8/002-layer7_2.17.patch
View File

@ -1,48 +1,15 @@
Index: iptables-1.3.8/extensions/.layer7-test
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.layer7-test 2007-07-31 15:27:56.000000000 -0500
@@ -0,0 +1,3 @@
--- /dev/null
+++ iptables-1.3.8/extensions/.layer7-test
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_layer7.h ] && echo layer7
+[ -f $KERNEL_DIR/include/linux/netfilter/xt_layer7.h ] && echo layer7
Index: iptables-1.3.8/extensions/ipt_layer7.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/ipt_layer7.h 2007-07-31 15:27:56.000000000 -0500
@@ -0,0 +1,27 @@
+/*
+ By Matthew Strait <quadong@users.sf.net>, Dec 2003.
+ http://l7-filter.sf.net
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version
+ 2 of the License, or (at your option) any later version.
+ http://www.gnu.org/licenses/gpl.txt
+*/
+
+#ifndef _IPT_LAYER7_H
+#define _IPT_LAYER7_H
+
+#define MAX_PATTERN_LEN 8192
+#define MAX_PROTOCOL_LEN 256
+
+typedef char *(*proc_ipt_search) (char *, char, char *);
+
+struct ipt_layer7_info {
+ char protocol[MAX_PROTOCOL_LEN];
+ char invert:1;
+ char pattern[MAX_PATTERN_LEN];
+ char pkt;
+};
+
+#endif /* _IPT_LAYER7_H */
Index: iptables-1.3.8/extensions/libipt_layer7.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_layer7.c 2007-07-31 15:27:56.000000000 -0500
@@ -0,0 +1,358 @@
--- /dev/null
+++ iptables-1.3.8/extensions/libipt_layer7.c
@@ -0,0 +1,394 @@
+/*
+ Shared library add-on to iptables to add layer 7 matching support.
+
@ -69,7 +36,7 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+#include <dirent.h>
+
+#include <iptables.h>
+#include "ipt_layer7.h"
+#include <linux/netfilter_ipv4/ipt_layer7.h>
+
+#define MAX_FN_LEN 256
+
@ -82,8 +49,7 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+ "LAYER7 match v%s options:\n"
+ "--l7dir <directory> : Look for patterns here instead of /etc/l7-protocols/\n"
+ " (--l7dir must be specified before --l7proto if used!)\n"
+ "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n"
+ "--l7pkt : Skip connection tracking and match individual packets\n",
+ "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n",
+ IPTABLES_VERSION);
+ fputc('\n', stdout);
+}
@ -91,7 +57,6 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+static struct option opts[] = {
+ { .name = "l7proto", .has_arg = 1, .flag = 0, .val = '1' },
+ { .name = "l7dir", .has_arg = 1, .flag = 0, .val = '2' },
+ { .name = "l7pkt", .has_arg = 0, .flag = 0, .val = '3' },
+ { .name = 0 }
+};
+
@ -120,10 +85,25 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+
+ if(datatype == protocol)
+ {
+ /* Ignore everything on the line beginning with the
+ first space or tab . For instance, this allows the
+ protocol line in http.pat to be "http " (or
+ "http I am so cool") instead of just "http". */
+ if(strchr(line, ' ')){
+ char * space = strchr(line, ' ');
+ space[0] = '\0';
+ }
+ if(strchr(line, '\t')){
+ char * space = strchr(line, '\t');
+ space[0] = '\0';
+ }
+
+ /* sanity check. First non-comment non-blank
+ line must be the same as the file name. */
+ if(strcmp(line, protoname))
+ exit_error(OTHER_PROBLEM,
+ "Protocol name (%s) doesn't match file name (%s). Bailing out\n",
+ protoname, filename);
+ line, filename);
+
+ if(strlen(line) >= MAX_PROTOCOL_LEN)
+ exit_error(PARAMETER_PROBLEM,
@ -191,6 +171,35 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+ /* carefully remember to call tolower here... */
+ result[rindex] = tolower( hex2dec(s[sindex + 2])*16 +
+ hex2dec(s[sindex + 3] ) );
+
+ switch ( result[rindex] )
+ {
+ case 0x24:
+ case 0x28:
+ case 0x29:
+ case 0x2a:
+ case 0x2b:
+ case 0x2e:
+ case 0x3f:
+ case 0x5b:
+ case 0x5c:
+ case 0x5d:
+ case 0x5e:
+ case 0x7c:
+ fprintf(stderr,
+ "Warning: layer7 regexp contains a control character, %c, in hex (\\x%c%c).\n"
+ "I recommend that you write this as %c or \\%c, depending on what you meant.\n",
+ result[rindex], s[sindex + 2], s[sindex + 3], result[rindex], result[rindex]);
+ break;
+ case 0x00:
+ fprintf(stderr,
+ "Warning: null (\\x00) in layer7 regexp. A null terminates the regexp string!\n");
+ break;
+ default:
+ break;
+ }
+
+
+ sindex += 3; /* 4 total */
+ }
+ else
@ -336,9 +345,6 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+
+ *flags = 1;
+ break;
+ case '3':
+ layer7info->pkt = 1;
+ break;
+
+ default:
+ return 0;
@ -347,12 +353,12 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+ return 1;
+}
+
+/* Final check; must have specified --pattern. */
+/* Final check; must have specified --l7proto */
+static void final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "LAYER7 match: You must specify `--pattern'");
+ "LAYER7 match: You must specify `--l7proto'");
+}
+
+static void print_protocol(char s[], int invert, int numeric)
@ -371,9 +377,6 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+
+ print_protocol(((struct ipt_layer7_info *)match->data)->protocol,
+ ((struct ipt_layer7_info *)match->data)->invert, numeric);
+
+ if (((struct ipt_layer7_info *)match->data)->pkt)
+ printf("l7pkt ");
+}
+/* Saves the union ipt_matchinfo in parsable form to stdout. */
+static void save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
@ -403,9 +406,9 @@ Index: iptables-1.3.8/extensions/libipt_layer7.c
+}
Index: iptables-1.3.8/extensions/libipt_layer7.man
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_layer7.man 2007-07-31 15:27:56.000000000 -0500
@@ -0,0 +1,13 @@
--- /dev/null
+++ iptables-1.3.8/extensions/libipt_layer7.man
@@ -0,0 +1,14 @@
+This module matches packets based on the application layer data of
+their connections. It uses regular expression matching to compare
+the application layer data to regular expressions found it the layer7
@ -414,8 +417,9 @@ Index: iptables-1.3.8/extensions/libipt_layer7.man
+.TP
+.BI "--l7proto " "\fIprotocol\fP"
+Match the specified protocol. The protocol name must match a file
+name in /etc/l7-protocols/
+name in /etc/l7-protocols/ or one of its first-level child directories.
+.TP
+.BI "--l7dir " "\fIdirectory\fP"
+Use \fIdirectory\fP instead of /etc/l7-protocols/
+Use \fIdirectory\fP instead of /etc/l7-protocols/. This option must be
+specified before --l7proto.
+

42
package/iptables/patches/1.3.8/003-layer7_2.17_pktmatch.patch Normal file
View File

@ -0,0 +1,42 @@
Index: iptables-1.3.8/extensions/libipt_layer7.c
===================================================================
--- iptables-1.3.8.orig/extensions/libipt_layer7.c
+++ iptables-1.3.8/extensions/libipt_layer7.c
@@ -37,7 +37,8 @@ static void help(void)
"LAYER7 match v%s options:\n"
"--l7dir <directory> : Look for patterns here instead of /etc/l7-protocols/\n"
" (--l7dir must be specified before --l7proto if used!)\n"
- "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n",
+ "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n"
+ "--l7pkt : Skip connection tracking and match individual packets\n",
IPTABLES_VERSION);
fputc('\n', stdout);
}
@@ -45,6 +46,7 @@ static void help(void)
static struct option opts[] = {
{ .name = "l7proto", .has_arg = 1, .flag = 0, .val = '1' },
{ .name = "l7dir", .has_arg = 1, .flag = 0, .val = '2' },
+ { .name = "l7pkt", .has_arg = 0, .flag = 0, .val = '3' },
{ .name = 0 }
};
@@ -333,6 +335,9 @@ static int parse(int c, char **argv, int
*flags = 1;
break;
+ case '3':
+ layer7info->pkt = 1;
+ break;
default:
return 0;
@@ -365,6 +370,9 @@ static void print(const struct ipt_ip *i
print_protocol(((struct ipt_layer7_info *)match->data)->protocol,
((struct ipt_layer7_info *)match->data)->invert, numeric);
+
+ if (((struct ipt_layer7_info *)match->data)->pkt)
+ printf("l7pkt ");
}
/* Saves the union ipt_matchinfo in parsable form to stdout. */
static void save(const struct ipt_ip *ip, const struct ipt_entry_match *match)

14
package/iptables/patches/004-multiport_v1.patch → package/iptables/patches/1.3.8/004-drop_multiport_v0_support.patch
View File

@ -1,7 +1,7 @@
Index: iptables-1.3.8/extensions/libipt_multiport.c
===================================================================
--- iptables-1.3.8.orig/extensions/libipt_multiport.c 2007-07-31 15:27:55.000000000 -0500
+++ iptables-1.3.8/extensions/libipt_multiport.c 2007-07-31 15:27:56.000000000 -0500
--- iptables-1.3.8.orig/extensions/libipt_multiport.c
+++ iptables-1.3.8/extensions/libipt_multiport.c
@@ -8,24 +8,6 @@
/* To ensure that iptables compiles with an old kernel */
#include "../include/linux/netfilter_ipv4/ipt_multiport.h"
@ -27,7 +27,7 @@ Index: iptables-1.3.8/extensions/libipt_multiport.c
static void
help_v1(void)
{
@@ -70,26 +52,6 @@
@@ -70,26 +52,6 @@ proto_to_name(u_int8_t proto)
}
}
@ -54,7 +54,7 @@ Index: iptables-1.3.8/extensions/libipt_multiport.c
static void
parse_multi_ports_v1(const char *portstring,
struct ipt_multiport_v1 *multiinfo,
@@ -156,58 +118,6 @@
@@ -156,58 +118,6 @@ check_proto(const struct ipt_entry *entr
"multiport only works with TCP, UDP, UDPLITE, SCTP and DCCP");
}
@ -113,7 +113,7 @@ Index: iptables-1.3.8/extensions/libipt_multiport.c
static int
parse_v1(int c, char **argv, int invert, unsigned int *flags,
const struct ipt_entry *entry,
@@ -284,43 +194,6 @@
@@ -284,43 +194,6 @@ print_port(u_int16_t port, u_int8_t prot
printf("%s", service);
}
@ -157,7 +157,7 @@ Index: iptables-1.3.8/extensions/libipt_multiport.c
static void
print_v1(const struct ipt_ip *ip,
const struct ipt_entry_match *match,
@@ -364,34 +237,6 @@
@@ -364,34 +237,6 @@ print_v1(const struct ipt_ip *ip,
printf(" ");
}
@ -192,7 +192,7 @@ Index: iptables-1.3.8/extensions/libipt_multiport.c
static void save_v1(const struct ipt_ip *ip,
const struct ipt_entry_match *match)
{
@@ -427,19 +272,20 @@
@@ -427,19 +272,20 @@ static void save_v1(const struct ipt_ip
printf(" ");
}

16
package/iptables/patches/005-imq1.patch → package/iptables/patches/1.3.8/005-imq1.patch
View File

@ -1,15 +1,15 @@
Index: iptables-1.3.8/extensions/.IMQ-test6
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.IMQ-test6 2007-07-31 15:27:56.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/extensions/.IMQ-test6
@@ -0,0 +1,3 @@
+#!/bin/sh
+# True if IMQ target patch is applied.
+[ -f $KERNEL_DIR/net/ipv6/netfilter/ip6t_IMQ.c ] && echo IMQ
Index: iptables-1.3.8/extensions/libip6t_IMQ.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libip6t_IMQ.c 2007-07-31 15:27:56.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/extensions/libip6t_IMQ.c
@@ -0,0 +1,101 @@
+/* Shared library add-on to iptables to add IMQ target support. */
+#include <stdio.h>
@ -114,16 +114,16 @@ Index: iptables-1.3.8/extensions/libip6t_IMQ.c
+}
Index: iptables-1.3.8/extensions/.IMQ-test
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/.IMQ-test 2007-07-31 15:27:56.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/extensions/.IMQ-test
@@ -0,0 +1,3 @@
+#!/bin/sh
+# True if IMQ target patch is applied.
+[ -f $KERNEL_DIR/net/ipv4/netfilter/ipt_IMQ.c ] && echo IMQ
Index: iptables-1.3.8/extensions/libipt_IMQ.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ iptables-1.3.8/extensions/libipt_IMQ.c 2007-07-31 15:27:56.000000000 -0500
--- /dev/null
+++ iptables-1.3.8/extensions/libipt_IMQ.c
@@ -0,0 +1,101 @@
+/* Shared library add-on to iptables to add IMQ target support. */
+#include <stdio.h>

454
package/iptables/patches/1.4.0/001-ipp2p-0.8.1rc1.patch Normal file
View File

@ -0,0 +1,454 @@
Index: iptables-1.4.0/extensions/Makefile
===================================================================
--- iptables-1.4.0.orig/extensions/Makefile
+++ iptables-1.4.0/extensions/Makefile
@@ -19,6 +19,10 @@ PF6_EXT_SE_SLIB:=$(PF6_EXT_SELINUX_SLIB)
PFX_EXT_SE_SLIB:=$(PFX_EXT_SELINUX_SLIB)
endif
+
+# ipp2p
+PF_EXT_SLIB += ipp2p
+
# Optionals
PF_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-test),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))
PF6_EXT_SLIB_OPTS:=$(foreach T,$(wildcard extensions/.*-test6),$(shell KERNEL_DIR=$(KERNEL_DIR) $(T)))
Index: iptables-1.4.0/extensions/libipt_ipp2p.c
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libipt_ipp2p.c
@@ -0,0 +1,398 @@
+
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <ctype.h>
+
+#include <iptables.h>
+
+#include <linux/netfilter_ipv4/ipt_ipp2p.h>
+
+static void
+help(void)
+{
+ printf(
+ "IPP2P v%s options:\n"
+ " --ipp2p Grab all known p2p packets\n"
+ " --edk [TCP&UDP] All known eDonkey/eMule/Overnet packets\n"
+ " --dc [TCP] All known Direct Connect packets\n"
+ " --kazaa [TCP&UDP] All known KaZaA packets\n"
+ " --gnu [TCP&UDP] All known Gnutella packets\n"
+ " --bit [TCP&UDP] All known BitTorrent packets\n"
+ " --apple [TCP] All known AppleJuice packets\n"
+ " --winmx [TCP] All known WinMX\n"
+ " --soul [TCP] All known SoulSeek\n"
+ " --ares [TCP] All known Ares\n\n"
+ " EXPERIMENTAL protocols (please send feedback to: ipp2p@ipp2p.org) :\n"
+ " --mute [TCP] All known Mute packets\n"
+ " --waste [TCP] All known Waste packets\n"
+ " --xdcc [TCP] All known XDCC packets (only xdcc login)\n\n"
+ " DEBUG SUPPPORT, use only if you know why\n"
+ " --debug Generate kernel debug output, THIS WILL SLOW DOWN THE FILTER\n"
+ "\nNote that the follwing options will have the same meaning:\n"
+ " '--ipp2p' is equal to '--edk --dc --kazaa --gnu --bit --apple --winmx --soul --ares'\n"
+ "\nIPP2P was intended for TCP only. Due to increasing usage of UDP we needed to change this.\n"
+ "You can now use -p udp to search UDP packets only or without -p switch to search UDP and TCP packets.\n"
+ "\nSee README included with this package for more details or visit http://www.ipp2p.org\n"
+ "\nExamples:\n"
+ " iptables -A FORWARD -m ipp2p --ipp2p -j MARK --set-mark 0x01\n"
+ " iptables -A FORWARD -p udp -m ipp2p --kazaa --bit -j DROP\n"
+ " iptables -A FORWARD -p tcp -m ipp2p --edk --soul -j DROP\n\n"
+ , IPP2P_VERSION);
+}
+
+static struct option opts[] = {
+ { "ipp2p", 0, 0, '1' },
+ { "edk", 0, 0, '2' },
+ { "dc", 0, 0, '7' },
+ { "gnu", 0, 0, '9' },
+ { "kazaa", 0, 0, 'a' },
+ { "bit", 0, 0, 'b' },
+ { "apple", 0, 0, 'c' },
+ { "soul", 0, 0, 'd' },
+ { "winmx", 0, 0, 'e' },
+ { "ares", 0, 0, 'f' },
+ { "mute", 0, 0, 'g' },
+ { "waste", 0, 0, 'h' },
+ { "xdcc", 0, 0, 'i' },
+ { "debug", 0, 0, 'j' },
+ {0}
+};
+
+
+
+static void
+init(struct xt_entry_match *m)
+{
+ struct ipt_p2p_info *info = (struct ipt_p2p_info *)m->data;
+
+ /*init the module with default values*/
+ info->cmd = 0;
+ info->debug = 0;
+
+}
+
+
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry,
+ struct xt_entry_match **match)
+{
+ struct ipt_p2p_info *info = (struct ipt_p2p_info *)(*match)->data;
+
+ switch (c) {
+ case '1': /*cmd: ipp2p*/
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified once!");
+/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p-data' may only be "
+ "specified alone!");*/
+ if ((*flags) != 0)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += SHORT_HAND_IPP2P;
+ info->cmd = *flags;
+ break;
+
+ case '2': /*cmd: edk*/
+ if ((*flags & IPP2P_EDK) == IPP2P_EDK)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--edk' may only be "
+ "specified once");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p-data' may only be "
+ "specified alone!");*/
+ if ((*flags & IPP2P_DATA_EDK) == IPP2P_DATA_EDK)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: use `--edk' OR `--edk-data' but not both of them!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_EDK;
+ info->cmd = *flags;
+ break;
+
+
+ case '7': /*cmd: dc*/
+ if ((*flags & IPP2P_DC) == IPP2P_DC)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--dc' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p-data' may only be "
+ "specified alone!");*/
+ if ((*flags & IPP2P_DATA_DC) == IPP2P_DATA_DC)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: use `--dc' OR `--dc-data' but not both of them!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_DC;
+ info->cmd = *flags;
+ break;
+
+
+ case '9': /*cmd: gnu*/
+ if ((*flags & IPP2P_GNU) == IPP2P_GNU)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--gnu' may only be "
+ "specified once!");
+/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p-data' may only be "
+ "specified alone!");*/
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if ((*flags & IPP2P_DATA_GNU) == IPP2P_DATA_GNU)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: use `--gnu' OR `--gnu-data' but not both of them!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_GNU;
+ info->cmd = *flags;
+ break;
+
+ case 'a': /*cmd: kazaa*/
+ if ((*flags & IPP2P_KAZAA) == IPP2P_KAZAA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--kazaa' may only be "
+ "specified once!");
+/* if ((*flags & SHORT_HAND_DATA) == SHORT_HAND_DATA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p-data' may only be "
+ "specified alone!");*/
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if ((*flags & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: use `--kazaa' OR `--kazaa-data' but not both of them!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_KAZAA;
+ info->cmd = *flags;
+ break;
+
+ case 'b': /*cmd: bit*/
+ if ((*flags & IPP2P_BIT) == IPP2P_BIT)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--bit' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_BIT;
+ info->cmd = *flags;
+ break;
+
+ case 'c': /*cmd: apple*/
+ if ((*flags & IPP2P_APPLE) == IPP2P_APPLE)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--apple' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_APPLE;
+ info->cmd = *flags;
+ break;
+
+
+ case 'd': /*cmd: soul*/
+ if ((*flags & IPP2P_SOUL) == IPP2P_SOUL)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--soul' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_SOUL;
+ info->cmd = *flags;
+ break;
+
+
+ case 'e': /*cmd: winmx*/
+ if ((*flags & IPP2P_WINMX) == IPP2P_WINMX)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--winmx' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_WINMX;
+ info->cmd = *flags;
+ break;
+
+ case 'f': /*cmd: ares*/
+ if ((*flags & IPP2P_ARES) == IPP2P_ARES)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ares' may only be "
+ "specified once!");
+ if ((*flags & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ipp2p' may only be "
+ "specified alone!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_ARES;
+ info->cmd = *flags;
+ break;
+
+ case 'g': /*cmd: mute*/
+ if ((*flags & IPP2P_MUTE) == IPP2P_MUTE)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--mute' may only be "
+ "specified once!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_MUTE;
+ info->cmd = *flags;
+ break;
+ case 'h': /*cmd: waste*/
+ if ((*flags & IPP2P_WASTE) == IPP2P_WASTE)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--waste' may only be "
+ "specified once!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_WASTE;
+ info->cmd = *flags;
+ break;
+ case 'i': /*cmd: xdcc*/
+ if ((*flags & IPP2P_XDCC) == IPP2P_XDCC)
+ exit_error(PARAMETER_PROBLEM,
+ "ipp2p: `--ares' may only be "
+ "specified once!");
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ *flags += IPP2P_XDCC;
+ info->cmd = *flags;
+ break;
+
+ case 'j': /*cmd: debug*/
+ if (invert) exit_error(PARAMETER_PROBLEM, "ipp2p: invert [!] is not allowed!");
+ info->debug = 1;
+ break;
+
+ default:
+// exit_error(PARAMETER_PROBLEM,
+// "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n");
+ return 0;
+ }
+ return 1;
+}
+
+
+static void
+final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "\nipp2p-parameter problem: for ipp2p usage type: iptables -m ipp2p --help\n");
+}
+
+
+
+static void
+print(const void *ip,
+ const struct xt_entry_match *match,
+ int numeric)
+{
+ struct ipt_p2p_info *info = (struct ipt_p2p_info *)match->data;
+
+ printf("ipp2p v%s", IPP2P_VERSION);
+ if ((info->cmd & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P) printf(" --ipp2p");
+// if ((info->cmd & SHORT_HAND_DATA) == SHORT_HAND_DATA) printf(" --ipp2p-data");
+ if ((info->cmd & IPP2P_KAZAA) == IPP2P_KAZAA) printf(" --kazaa");
+// if ((info->cmd & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA) printf(" --kazaa-data");
+// if ((info->cmd & IPP2P_DATA_GNU) == IPP2P_DATA_GNU) printf(" --gnu-data");
+ if ((info->cmd & IPP2P_GNU) == IPP2P_GNU) printf(" --gnu");
+ if ((info->cmd & IPP2P_EDK) == IPP2P_EDK) printf(" --edk");
+// if ((info->cmd & IPP2P_DATA_EDK) == IPP2P_DATA_EDK) printf(" --edk-data");
+// if ((info->cmd & IPP2P_DATA_DC) == IPP2P_DATA_DC) printf(" --dc-data");
+ if ((info->cmd & IPP2P_DC) == IPP2P_DC) printf(" --dc");
+ if ((info->cmd & IPP2P_BIT) == IPP2P_BIT) printf(" --bit");
+ if ((info->cmd & IPP2P_APPLE) == IPP2P_APPLE) printf(" --apple");
+ if ((info->cmd & IPP2P_SOUL) == IPP2P_SOUL) printf(" --soul");
+ if ((info->cmd & IPP2P_WINMX) == IPP2P_WINMX) printf(" --winmx");
+ if ((info->cmd & IPP2P_ARES) == IPP2P_ARES) printf(" --ares");
+ if ((info->cmd & IPP2P_MUTE) == IPP2P_MUTE) printf(" --mute");
+ if ((info->cmd & IPP2P_WASTE) == IPP2P_WASTE) printf(" --waste");
+ if ((info->cmd & IPP2P_XDCC) == IPP2P_XDCC) printf(" --xdcc");
+ if (info->debug != 0) printf(" --debug");
+ printf(" ");
+}
+
+
+
+static void
+save(const void *ip, const struct xt_entry_match *match)
+{
+ struct ipt_p2p_info *info = (struct ipt_p2p_info *)match->data;
+
+ if ((info->cmd & SHORT_HAND_IPP2P) == SHORT_HAND_IPP2P) printf("--ipp2p ");
+// if ((info->cmd & SHORT_HAND_DATA) == SHORT_HAND_DATA) printf("--ipp2p-data ");
+ if ((info->cmd & IPP2P_KAZAA) == IPP2P_KAZAA) printf("--kazaa ");
+// if ((info->cmd & IPP2P_DATA_KAZAA) == IPP2P_DATA_KAZAA) printf("--kazaa-data ");
+// if ((info->cmd & IPP2P_DATA_GNU) == IPP2P_DATA_GNU) printf("--gnu-data ");
+ if ((info->cmd & IPP2P_GNU) == IPP2P_GNU) printf("--gnu ");
+ if ((info->cmd & IPP2P_EDK) == IPP2P_EDK) printf("--edk ");
+// if ((info->cmd & IPP2P_DATA_EDK) == IPP2P_DATA_EDK) printf("--edk-data ");
+// if ((info->cmd & IPP2P_DATA_DC) == IPP2P_DATA_DC) printf("--dc-data ");
+ if ((info->cmd & IPP2P_DC) == IPP2P_DC) printf("--dc ");
+ if ((info->cmd & IPP2P_BIT) == IPP2P_BIT) printf("--bit ");
+ if ((info->cmd & IPP2P_APPLE) == IPP2P_APPLE) printf("--apple ");
+ if ((info->cmd & IPP2P_SOUL) == IPP2P_SOUL) printf("--soul ");
+ if ((info->cmd & IPP2P_WINMX) == IPP2P_WINMX) printf("--winmx ");
+ if ((info->cmd & IPP2P_ARES) == IPP2P_ARES) printf("--ares ");
+ if ((info->cmd & IPP2P_MUTE) == IPP2P_MUTE) printf(" --mute");
+ if ((info->cmd & IPP2P_WASTE) == IPP2P_WASTE) printf(" --waste");
+ if ((info->cmd & IPP2P_XDCC) == IPP2P_XDCC) printf(" --xdcc");
+ if (info->debug != 0) printf("--debug ");
+}
+
+
+
+
+static
+struct iptables_match ipp2p=
+{
+ .family = AF_INET,
+ .name = "ipp2p",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(sizeof(struct ipt_p2p_info)),
+ .userspacesize = IPT_ALIGN(sizeof(struct ipt_p2p_info)),
+ .help = help,
+ .init = init,
+ .parse = parse,
+ .final_check = final_check,
+ .print = print,
+ .save = save,
+ .extra_opts = opts
+};
+
+
+
+void _init(void)
+{
+ register_match(&ipp2p);
+}
+
Index: iptables-1.4.0/include/linux/netfilter_ipv4/ipt_ipp2p.h
===================================================================
--- /dev/null
+++ iptables-1.4.0/include/linux/netfilter_ipv4/ipt_ipp2p.h
@@ -0,0 +1,31 @@
+#ifndef __IPT_IPP2P_H
+#define __IPT_IPP2P_H
+#define IPP2P_VERSION "0.8.1_rc1"
+
+struct ipt_p2p_info {
+ int cmd;
+ int debug;
+};
+
+#endif //__IPT_IPP2P_H
+
+#define SHORT_HAND_IPP2P 1 /* --ipp2p switch*/
+//#define SHORT_HAND_DATA 4 /* --ipp2p-data switch*/
+#define SHORT_HAND_NONE 5 /* no short hand*/
+
+#define IPP2P_EDK (1 << 1)
+#define IPP2P_DATA_KAZAA (1 << 2)
+#define IPP2P_DATA_EDK (1 << 3)
+#define IPP2P_DATA_DC (1 << 4)
+#define IPP2P_DC (1 << 5)
+#define IPP2P_DATA_GNU (1 << 6)
+#define IPP2P_GNU (1 << 7)
+#define IPP2P_KAZAA (1 << 8)
+#define IPP2P_BIT (1 << 9)
+#define IPP2P_APPLE (1 << 10)
+#define IPP2P_SOUL (1 << 11)
+#define IPP2P_WINMX (1 << 12)
+#define IPP2P_ARES (1 << 13)
+#define IPP2P_MUTE (1 << 14)
+#define IPP2P_WASTE (1 << 15)
+#define IPP2P_XDCC (1 << 16)

418
package/iptables/patches/1.4.0/002-layer7_2.17.patch Normal file
View File

@ -0,0 +1,418 @@
--- iptables-1.4.0rc1/extensions/libipt_layer7.c 1969-12-31 18:00:00.000000000 -0600
+++ iptables-1.4.0rc1-layer7/extensions/libipt_layer7.c 2007-11-19 06:06:56.000000000 -0600
@@ -0,0 +1,393 @@
+/*
+ Shared library add-on to iptables to add layer 7 matching support.
+
+ By Matthew Strait <quadong@users.sf.net>, Oct 2003.
+
+ http://l7-filter.sf.net
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version
+ 2 of the License, or (at your option) any later version.
+ http://www.gnu.org/licenses/gpl.txt
+
+ Based on libipt_string.c (C) 2000 Emmanuel Roger <winfield@freegates.be>
+*/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <ctype.h>
+#include <dirent.h>
+
+#include <iptables.h>
+#include <linux/netfilter/xt_layer7.h>
+
+#define MAX_FN_LEN 256
+
+static char l7dir[MAX_FN_LEN] = "\0";
+
+/* Function which prints out usage message. */
+static void help(void)
+{
+ printf(
+ "LAYER7 match v%s options:\n"
+ "--l7dir <directory> : Look for patterns here instead of /etc/l7-protocols/\n"
+ " (--l7dir must be specified before --l7proto if used!)\n"
+ "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n",
+ IPTABLES_VERSION);
+ fputc('\n', stdout);
+}
+
+static struct option opts[] = {
+ { .name = "l7proto", .has_arg = 1, .flag = 0, .val = '1' },
+ { .name = "l7dir", .has_arg = 1, .flag = 0, .val = '2' },
+ { .name = 0 }
+};
+
+/* reads filename, puts protocol info into layer7_protocol_info, number of protocols to numprotos */
+int parse_protocol_file(char * filename, const char * protoname, struct xt_layer7_info *info)
+{
+ FILE * f;
+ char * line = NULL;
+ size_t len = 0;
+
+ enum { protocol, pattern, done } datatype = protocol;
+
+ f = fopen(filename, "r");
+
+ if(!f)
+ return 0;
+
+ while(getline(&line, &len, f) != -1)
+ {
+ if(strlen(line) < 2 || line[0] == '#')
+ continue;
+
+ /* strip the pesky newline... */
+ if(line[strlen(line) - 1] == '\n')
+ line[strlen(line) - 1] = '\0';
+
+ if(datatype == protocol)
+ {
+ /* Ignore everything on the line beginning with the
+ first space or tab . For instance, this allows the
+ protocol line in http.pat to be "http " (or
+ "http I am so cool") instead of just "http". */
+ if(strchr(line, ' ')){
+ char * space = strchr(line, ' ');
+ space[0] = '\0';
+ }
+ if(strchr(line, '\t')){
+ char * space = strchr(line, '\t');
+ space[0] = '\0';
+ }
+
+ /* sanity check. First non-comment non-blank
+ line must be the same as the file name. */
+ if(strcmp(line, protoname))
+ exit_error(OTHER_PROBLEM,
+ "Protocol name (%s) doesn't match file name (%s). Bailing out\n",
+ line, filename);
+
+ if(strlen(line) >= MAX_PROTOCOL_LEN)
+ exit_error(PARAMETER_PROBLEM,
+ "Protocol name in %s too long!", filename);
+ strncpy(info->protocol, line, MAX_PROTOCOL_LEN);
+
+ datatype = pattern;
+ }
+ else if(datatype == pattern)
+ {
+ if(strlen(line) >= MAX_PATTERN_LEN)
+ exit_error(PARAMETER_PROBLEM, "Pattern in %s too long!", filename);
+ strncpy(info->pattern, line, MAX_PATTERN_LEN);
+
+ datatype = done;
+ break;
+ }
+ else
+ exit_error(OTHER_PROBLEM, "Internal error");
+ }
+
+ if(datatype != done)
+ exit_error(OTHER_PROBLEM, "Failed to get all needed data from %s", filename);
+
+ if(line) free(line);
+ fclose(f);
+
+ return 1;
+
+/*
+ fprintf(stderr, "protocol: %s\npattern: %s\n\n",
+ info->protocol,
+ info->pattern);
+*/
+}
+
+static int hex2dec(char c)
+{
+ switch (c)
+ {
+ case '0' ... '9':
+ return c - '0';
+ case 'a' ... 'f':
+ return c - 'a' + 10;
+ case 'A' ... 'F':
+ return c - 'A' + 10;
+ default:
+ exit_error(OTHER_PROBLEM, "hex2dec: bad value!\n");
+ return 0;
+ }
+}
+
+/* takes a string with \xHH escapes and returns one with the characters
+they stand for */
+static char * pre_process(char * s)
+{
+ char * result = malloc(strlen(s) + 1);
+ int sindex = 0, rindex = 0;
+ while( sindex < strlen(s) )
+ {
+ if( sindex + 3 < strlen(s) &&
+ s[sindex] == '\\' && s[sindex+1] == 'x' &&
+ isxdigit(s[sindex + 2]) && isxdigit(s[sindex + 3]) )
+ {
+ /* carefully remember to call tolower here... */
+ result[rindex] = tolower( hex2dec(s[sindex + 2])*16 +
+ hex2dec(s[sindex + 3] ) );
+
+ switch ( result[rindex] )
+ {
+ case 0x24:
+ case 0x28:
+ case 0x29:
+ case 0x2a:
+ case 0x2b:
+ case 0x2e:
+ case 0x3f:
+ case 0x5b:
+ case 0x5c:
+ case 0x5d:
+ case 0x5e:
+ case 0x7c:
+ fprintf(stderr,
+ "Warning: layer7 regexp contains a control character, %c, in hex (\\x%c%c).\n"
+ "I recommend that you write this as %c or \\%c, depending on what you meant.\n",
+ result[rindex], s[sindex + 2], s[sindex + 3], result[rindex], result[rindex]);
+ break;
+ case 0x00:
+ fprintf(stderr,
+ "Warning: null (\\x00) in layer7 regexp. A null terminates the regexp string!\n");
+ break;
+ default:
+ break;
+ }
+
+
+ sindex += 3; /* 4 total */
+ }
+ else
+ result[rindex] = tolower(s[sindex]);
+
+ sindex++;
+ rindex++;
+ }
+ result[rindex] = '\0';
+
+ return result;
+}
+
+#define MAX_SUBDIRS 128
+char ** readl7dir(char * dirname)
+{
+ DIR * scratchdir;
+ struct dirent ** namelist;
+ char ** subdirs = malloc(MAX_SUBDIRS * sizeof(char *));
+
+ int n, d = 1;
+ subdirs[0] = "";
+
+ n = scandir(dirname, &namelist, 0, alphasort);
+
+ if (n < 0)
+ {
+ perror("scandir");
+ exit_error(OTHER_PROBLEM, "Couldn't open %s\n", dirname);
+ }
+ else
+ {
+ while(n--)
+ {
+ char fulldirname[MAX_FN_LEN];
+
+ snprintf(fulldirname, MAX_FN_LEN, "%s/%s", dirname, namelist[n]->d_name);
+
+ if((scratchdir = opendir(fulldirname)) != NULL)
+ {
+ closedir(scratchdir);
+
+ if(!strcmp(namelist[n]->d_name, ".") ||
+ !strcmp(namelist[n]->d_name, ".."))
+ /* do nothing */ ;
+ else
+ {
+ subdirs[d] = malloc(strlen(namelist[n]->d_name) + 1);
+ strcpy(subdirs[d], namelist[n]->d_name);
+ d++;
+ if(d >= MAX_SUBDIRS - 1)
+ {
+ fprintf(stderr,
+ "Too many subdirectories, skipping the rest!\n");
+ break;
+ }
+ }
+ }
+ free(namelist[n]);
+ }
+ free(namelist);
+ }
+
+ subdirs[d] = NULL;
+
+ return subdirs;
+}
+
+static void
+parse_layer7_protocol(const char *s, struct xt_layer7_info *info)
+{
+ char filename[MAX_FN_LEN];
+ char * dir = NULL;
+ char ** subdirs;
+ int n = 0, done = 0;
+
+ if(strlen(l7dir) > 0)
+ dir = l7dir;
+ else
+ dir = "/etc/l7-protocols";
+
+ subdirs = readl7dir(dir);
+
+ while(subdirs[n] != NULL)
+ {
+ int c = snprintf(filename, MAX_FN_LEN, "%s/%s/%s.pat", dir, subdirs[n], s);
+
+ //fprintf(stderr, "Trying to find pattern in %s ... ", filename);
+
+ if(c > MAX_FN_LEN)
+ {
+ exit_error(OTHER_PROBLEM,
+ "Filename beginning with %s is too long!\n", filename);
+ }
+
+ /* read in the pattern from the file */
+ if(parse_protocol_file(filename, s, info))
+ {
+ //fprintf(stderr, "found\n");
+ done = 1;
+ break;
+ }
+
+ //fprintf(stderr, "not found\n");
+
+ n++;
+ }
+
+ if(!done)
+ exit_error(OTHER_PROBLEM,
+ "Couldn't find a pattern definition file for %s.\n", s);
+
+ /* process \xHH escapes and tolower everything. (our regex lib has no
+ case insensitivity option.) */
+ strncpy(info->pattern, pre_process(info->pattern), MAX_PATTERN_LEN);
+}
+
+/* Function which parses command options; returns true if it ate an option */
+static int parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_layer7_info *layer7info =
+ (struct xt_layer7_info *)(*match)->data;
+
+ switch (c) {
+ case '1':
+ check_inverse(optarg, &invert, &optind, 0);
+ parse_layer7_protocol(argv[optind-1], layer7info);
+ if (invert)
+ layer7info->invert = 1;
+ *flags = 1;
+ break;
+
+ case '2':
+ /* not going to use this, but maybe we need to strip a ! anyway (?) */
+ check_inverse(optarg, &invert, &optind, 0);
+
+ if(strlen(argv[optind-1]) >= MAX_FN_LEN)
+ exit_error(PARAMETER_PROBLEM, "directory name too long\n");
+
+ strncpy(l7dir, argv[optind-1], MAX_FN_LEN);
+
+ *flags = 1;
+ break;
+
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Final check; must have specified --l7proto */
+static void final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "LAYER7 match: You must specify `--l7proto'");
+}
+
+static void print_protocol(char s[], int invert, int numeric)
+{
+ fputs("l7proto ", stdout);
+ if (invert) fputc('!', stdout);
+ printf("%s ", s);
+}
+
+/* Prints out the matchinfo. */
+static void print(const void *ip,
+ const struct xt_entry_match *match,
+ int numeric)
+{
+ printf("LAYER7 ");
+
+ print_protocol(((struct xt_layer7_info *)match->data)->protocol,
+ ((struct xt_layer7_info *)match->data)->invert, numeric);
+}
+/* Saves the union ipt_matchinfo in parsable form to stdout. */
+static void save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_layer7_info *info =
+ (const struct xt_layer7_info*) match->data;
+
+ printf("--l7proto %s%s ", (info->invert) ? "! ": "", info->protocol);
+}
+
+static struct iptables_match layer7 = {
+ .name = "layer7",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(sizeof(struct xt_layer7_info)),
+ .userspacesize = IPT_ALIGN(sizeof(struct xt_layer7_info)),
+ .help = &help,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+void _init(void)
+{
+ register_match(&layer7);
+}
--- iptables-1.4.0rc1/extensions/libipt_layer7.man 1969-12-31 18:00:00.000000000 -0600
+++ iptables-1.4.0rc1-layer7/extensions/libipt_layer7.man 2007-11-19 05:49:46.000000000 -0600
@@ -0,0 +1,14 @@
+This module matches packets based on the application layer data of
+their connections. It uses regular expression matching to compare
+the application layer data to regular expressions found it the layer7
+configuration files. This is an experimental module which can be found at
+http://l7-filter.sf.net. It takes two options.
+.TP
+.BI "--l7proto " "\fIprotocol\fP"
+Match the specified protocol. The protocol name must match a file
+name in /etc/l7-protocols/ or one of its first-level child directories.
+.TP
+.BI "--l7dir " "\fIdirectory\fP"
+Use \fIdirectory\fP instead of /etc/l7-protocols/. This option must be
+specified before --l7proto.
+
--- iptables-1.4.0rc1/extensions/.layer7-test 1969-12-31 18:00:00.000000000 -0600
+++ iptables-1.4.0rc1-layer7/extensions/.layer7-test 2007-11-19 06:18:58.000000000 -0600
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/include/linux/netfilter/xt_layer7.h ] && echo layer7

43
package/iptables/patches/1.4.0/003-layer7_2.17_pktmatch.patch Normal file
View File

@ -0,0 +1,43 @@
Index: iptables-1.4.0/extensions/libipt_layer7.c
===================================================================
--- iptables-1.4.0.orig/extensions/libipt_layer7.c
+++ iptables-1.4.0/extensions/libipt_layer7.c
@@ -43,7 +43,8 @@ static void help(void)
"LAYER7 match v%s options:\n"
"--l7dir <directory> : Look for patterns here instead of /etc/l7-protocols/\n"
" (--l7dir must be specified before --l7proto if used!)\n"
- "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n",
+ "--l7proto [!] <name> : Match the protocol defined in /etc/l7-protocols/name.pat\n"
+ "--l7pkt : Skip connection tracking and match individual packets\n",
IPTABLES_VERSION);
fputc('\n', stdout);
}
@@ -51,6 +52,7 @@ static void help(void)
static struct option opts[] = {
{ .name = "l7proto", .has_arg = 1, .flag = 0, .val = '1' },
{ .name = "l7dir", .has_arg = 1, .flag = 0, .val = '2' },
+ { .name = "l7pkt", .has_arg = 0, .flag = 0, .val = '3' },
{ .name = 0 }
};
@@ -339,6 +341,10 @@ static int parse(int c, char **argv, int
*flags = 1;
break;
+ case '3':
+ layer7info->pkt = 1;
+ break;
+
default:
return 0;
}
@@ -370,6 +376,9 @@ static void print(const void *ip,
print_protocol(((struct xt_layer7_info *)match->data)->protocol,
((struct xt_layer7_info *)match->data)->invert, numeric);
+
+ if (((struct xt_layer7_info *)match->data)->pkt)
+ printf("l7pkt ");
}
/* Saves the union ipt_matchinfo in parsable form to stdout. */
static void save(const void *ip, const struct xt_entry_match *match)

279
package/iptables/patches/1.4.0/004-drop_multiport_v0_support.patch Normal file
View File

@ -0,0 +1,279 @@
Index: iptables-1.4.0/extensions/libxt_multiport.c
===================================================================
--- iptables-1.4.0.orig/extensions/libxt_multiport.c
+++ iptables-1.4.0/extensions/libxt_multiport.c
@@ -12,22 +12,6 @@
#include "../include/linux/netfilter/xt_multiport.h"
/* Function which prints out usage message. */
-static void multiport_help(void)
-{
- printf(
-"multiport v%s options:\n"
-" --source-ports port[,port,port...]\n"
-" --sports ...\n"
-" match source port(s)\n"
-" --destination-ports port[,port,port...]\n"
-" --dports ...\n"
-" match destination port(s)\n"
-" --ports port[,port,port]\n"
-" match both source and destination port(s)\n"
-" NOTE: this kernel does not support port ranges in multiport.\n",
-IPTABLES_VERSION);
-}
-
static void multiport_help_v1(void)
{
printf(
@@ -71,26 +55,6 @@ proto_to_name(u_int8_t proto)
}
}
-static unsigned int
-parse_multi_ports(const char *portstring, u_int16_t *ports, const char *proto)
-{
- char *buffer, *cp, *next;
- unsigned int i;
-
- buffer = strdup(portstring);
- if (!buffer) exit_error(OTHER_PROBLEM, "strdup failed");
-
- for (cp=buffer, i=0; cp && i<XT_MULTI_PORTS; cp=next,i++)
- {
- next=strchr(cp, ',');
- if (next) *next++='\0';
- ports[i] = parse_port(cp, proto);
- }
- if (cp) exit_error(PARAMETER_PROBLEM, "too many ports specified");
- free(buffer);
- return i;
-}
-
static void
parse_multi_ports_v1(const char *portstring,
struct xt_multiport_v1 *multiinfo,
@@ -154,73 +118,6 @@ check_proto(u_int16_t pnum, u_int8_t inv
/* Function which parses command options; returns true if it
ate an option */
static int
-__multiport_parse(int c, char **argv, int invert, unsigned int *flags,
- struct xt_entry_match **match, u_int16_t pnum,
- u_int8_t invflags)
-{
- const char *proto;
- struct xt_multiport *multiinfo
- = (struct xt_multiport *)(*match)->data;
-
- switch (c) {
- case '1':
- check_inverse(argv[optind-1], &invert, &optind, 0);
- proto = check_proto(pnum, invflags);
- multiinfo->count = parse_multi_ports(argv[optind-1],
- multiinfo->ports, proto);
- multiinfo->flags = XT_MULTIPORT_SOURCE;
- break;
-
- case '2':
- check_inverse(argv[optind-1], &invert, &optind, 0);
- proto = check_proto(pnum, invflags);
- multiinfo->count = parse_multi_ports(argv[optind-1],
- multiinfo->ports, proto);
- multiinfo->flags = XT_MULTIPORT_DESTINATION;
- break;
-
- case '3':
- check_inverse(argv[optind-1], &invert, &optind, 0);
- proto = check_proto(pnum, invflags);
- multiinfo->count = parse_multi_ports(argv[optind-1],
- multiinfo->ports, proto);
- multiinfo->flags = XT_MULTIPORT_EITHER;
- break;
-
- default:
- return 0;
- }
-
- if (invert)
- exit_error(PARAMETER_PROBLEM,
- "multiport does not support invert");
-
- if (*flags)
- exit_error(PARAMETER_PROBLEM,
- "multiport can only have one option");
- *flags = 1;
- return 1;
-}
-
-static int
-multiport_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *e, struct xt_entry_match **match)
-{
- const struct ipt_entry *entry = e;
- return __multiport_parse(c, argv, invert, flags, match,
- entry->ip.proto, entry->ip.invflags);
-}
-
-static int
-multiport_parse6(int c, char **argv, int invert, unsigned int *flags,
- const void *e, struct xt_entry_match **match)
-{
- const struct ip6t_entry *entry = (const struct ip6t_entry *)e;
- return __multiport_parse(c, argv, invert, flags, match,
- entry->ipv6.proto, entry->ipv6.invflags);
-}
-
-static int
__multiport_parse_v1(int c, char **argv, int invert, unsigned int *flags,
struct xt_entry_match **match, u_int16_t pnum,
u_int8_t invflags)
@@ -313,55 +210,6 @@ print_port(u_int16_t port, u_int8_t prot
}
/* Prints out the matchinfo. */
-static void
-__multiport_print(const struct xt_entry_match *match, int numeric,
- u_int16_t proto)
-{
- const struct xt_multiport *multiinfo
- = (const struct xt_multiport *)match->data;
- unsigned int i;
-
- printf("multiport ");
-
- switch (multiinfo->flags) {
- case XT_MULTIPORT_SOURCE:
- printf("sports ");
- break;
-
- case XT_MULTIPORT_DESTINATION:
- printf("dports ");
- break;
-
- case XT_MULTIPORT_EITHER:
- printf("ports ");
- break;
-
- default:
- printf("ERROR ");
- break;
- }
-
- for (i=0; i < multiinfo->count; i++) {
- printf("%s", i ? "," : "");
- print_port(multiinfo->ports[i], proto, numeric);
- }
- printf(" ");
-}
-
-static void multiport_print(const void *ip_void,
- const struct xt_entry_match *match, int numeric)
-{
- const struct ipt_ip *ip = ip_void;
- __multiport_print(match, numeric, ip->proto);
-}
-
-static void multiport_print6(const void *ip_void,
- const struct xt_entry_match *match, int numeric)
-{
- const struct ip6t_ip6 *ip = (const struct ip6t_ip6 *)ip_void;
- __multiport_print(match, numeric, ip->proto);
-}
-
static void __multiport_print_v1(const struct xt_entry_match *match,
int numeric, u_int16_t proto)
{
@@ -418,48 +266,6 @@ static void multiport_print6_v1(const vo
}
/* Saves the union ipt_matchinfo in parsable form to stdout. */
-static void __multiport_save(const struct xt_entry_match *match,
- u_int16_t proto)
-{
- const struct xt_multiport *multiinfo
- = (const struct xt_multiport *)match->data;
- unsigned int i;
-
- switch (multiinfo->flags) {
- case XT_MULTIPORT_SOURCE:
- printf("--sports ");
- break;
-
- case XT_MULTIPORT_DESTINATION:
- printf("--dports ");
- break;
-
- case XT_MULTIPORT_EITHER:
- printf("--ports ");
- break;
- }
-
- for (i=0; i < multiinfo->count; i++) {
- printf("%s", i ? "," : "");
- print_port(multiinfo->ports[i], proto, 1);
- }
- printf(" ");
-}
-
-static void multiport_save(const void *ip_void,
- const struct xt_entry_match *match)
-{
- const struct ipt_ip *ip = ip_void;
- __multiport_save(match, ip->proto);
-}
-
-static void multiport_save6(const void *ip_void,
- const struct xt_entry_match *match)
-{
- const struct ip6t_ip6 *ip = (const struct ip6t_ip6 *)ip_void;
- __multiport_save(match, ip->proto);
-}
-
static void __multiport_save_v1(const struct xt_entry_match *match,
u_int16_t proto)
{
@@ -509,36 +315,6 @@ static void multiport_save6_v1(const voi
__multiport_save_v1(match, ip->proto);
}
-static struct xtables_match multiport_match = {
- .family = AF_INET,
- .name = "multiport",
- .revision = 0,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_multiport)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_multiport)),
- .help = multiport_help,
- .parse = multiport_parse,
- .final_check = multiport_check,
- .print = multiport_print,
- .save = multiport_save,
- .extra_opts = multiport_opts,
-};
-
-static struct xtables_match multiport_match6 = {
- .family = AF_INET6,
- .name = "multiport",
- .revision = 0,
- .version = IPTABLES_VERSION,
- .size = XT_ALIGN(sizeof(struct xt_multiport)),
- .userspacesize = XT_ALIGN(sizeof(struct xt_multiport)),
- .help = multiport_help,
- .parse = multiport_parse6,
- .final_check = multiport_check,
- .print = multiport_print6,
- .save = multiport_save6,
- .extra_opts = multiport_opts,
-};
-
static struct xtables_match multiport_match_v1 = {
.family = AF_INET,
.name = "multiport",
@@ -572,8 +348,6 @@ static struct xtables_match multiport_ma
void
_init(void)
{
- xtables_register_match(&multiport_match);
- xtables_register_match(&multiport_match6);
xtables_register_match(&multiport_match_v1);
xtables_register_match(&multiport_match6_v1);
}

219
package/iptables/patches/1.4.0/005-imq1.patch Normal file
View File

@ -0,0 +1,219 @@
--- iptables-1.4.0.orig/extensions.orig/.IMQ-test6 Thu Jan 1 01:00:00 1970
+++ iptables-1.4.0/extensions/.IMQ-test6 Mon Jun 16 10:12:47 2003
@@ -0,0 +1,3 @@
+#!/bin/sh
+# True if IMQ target patch is applied.
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv6/ip6t_IMQ.h ] && echo IMQ
--- iptables-1.4.0.orig/extensions.orig/libip6t_IMQ.c Thu Jan 1 01:00:00 1970
+++ iptables-1.4.0/extensions/libip6t_IMQ.c Mon Jun 16 10:12:47 2003
@@ -0,0 +1,100 @@
+/* Shared library add-on to iptables to add IMQ target support. */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv6/ip6t_IMQ.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+ printf(
+"IMQ target v%s options:\n"
+" --todev <N> enqueue to imq<N>, defaults to 0\n",
+IPTABLES_VERSION);
+}
+
+static struct option opts[] = {
+ { "todev", 1, 0, '1' },
+ { 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct xt_entry_target *t)
+{
+ struct ip6t_imq_info *mr = (struct ip6t_imq_info*)t->data;
+
+ mr->todev = 0;
+}
+
+/* Function which parses command options; returns true if it
+ ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry,
+ struct xt_entry_target **target)
+{
+ struct ip6t_imq_info *mr = (struct ip6t_imq_info*)(*target)->data;
+
+ switch(c) {
+ case '1':
+ if (check_inverse(optarg, &invert, NULL, 0))
+ exit_error(PARAMETER_PROBLEM,
+ "Unexpected `!' after --todev");
+ mr->todev=atoi(optarg);
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+}
+
+/* Prints out the targinfo. */
+static void
+print(const void *ip,
+ const struct xt_entry_target *target,
+ int numeric)
+{
+ struct ip6t_imq_info *mr = (struct ip6t_imq_info*)target->data;
+
+ printf("IMQ: todev %u ", mr->todev);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const void *ip, const struct xt_entry_target *target)
+{
+ struct ip6t_imq_info *mr = (struct ip6t_imq_info*)target->data;
+
+ printf("--todev %u", mr->todev);
+}
+
+static struct ip6tables_target imq = {
+ .next = NULL,
+ .name = "IMQ",
+ .version = IPTABLES_VERSION,
+ .size = IP6T_ALIGN(sizeof(struct ip6t_imq_info)),
+ .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_imq_info)),
+ .help = &help,
+ .init = &init,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+static __attribute__((constructor)) void _init(void)
+{
+ register_target6(&imq);
+}
--- iptables-1.4.0.orig/extensions.orig/.IMQ-test Thu Jan 1 01:00:00 1970
+++ iptables-1.4.0/extensions/.IMQ-test Mon Jun 16 10:12:47 2003
@@ -0,0 +1,3 @@
+#!/bin/sh
+# True if IMQ target patch is applied.
+[ -f $KERNEL_DIR/include/linux/netfilter_ipv4/ipt_IMQ.h ] && echo IMQ
--- iptables-1.4.0.orig/extensions.orig/libipt_IMQ.c Thu Jan 1 01:00:00 1970
+++ iptables-1.4.0/extensions/libipt_IMQ.c Mon Jun 16 10:12:47 2003
@@ -0,0 +1,100 @@
+/* Shared library add-on to iptables to add IMQ target support. */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_IMQ.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+ printf(
+"IMQ target v%s options:\n"
+" --todev <N> enqueue to imq<N>, defaults to 0\n",
+IPTABLES_VERSION);
+}
+
+static struct option opts[] = {
+ { "todev", 1, 0, '1' },
+ { 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct xt_entry_target *t)
+{
+ struct ipt_imq_info *mr = (struct ipt_imq_info*)t->data;
+
+ mr->todev = 0;
+}
+
+/* Function which parses command options; returns true if it
+ ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry,
+ struct xt_entry_target **target)
+{
+ struct ipt_imq_info *mr = (struct ipt_imq_info*)(*target)->data;
+
+ switch(c) {
+ case '1':
+ if (check_inverse(optarg, &invert, NULL, 0))
+ exit_error(PARAMETER_PROBLEM,
+ "Unexpected `!' after --todev");
+ mr->todev=atoi(optarg);
+ break;
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+}
+
+/* Prints out the targinfo. */
+static void
+print(const void *ip,
+ const struct xt_entry_target *target,
+ int numeric)
+{
+ struct ipt_imq_info *mr = (struct ipt_imq_info*)target->data;
+
+ printf("IMQ: todev %u ", mr->todev);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const void *ip, const struct xt_entry_target *target)
+{
+ struct ipt_imq_info *mr = (struct ipt_imq_info*)target->data;
+
+ printf("--todev %u", mr->todev);
+}
+
+static struct iptables_target imq = {
+ .next = NULL,
+ .name = "IMQ",
+ .version = IPTABLES_VERSION,
+ .size = IPT_ALIGN(sizeof(struct ipt_imq_info)),
+ .userspacesize = IPT_ALIGN(sizeof(struct ipt_imq_info)),
+ .help = &help,
+ .init = &init,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+static __attribute__((constructor)) void _init(void)
+{
+ register_target(&imq);
+}

393
package/iptables/patches/1.4.0/006-chaostables_0.8.patch Normal file
View File

@ -0,0 +1,393 @@
Index: iptables-1.4.0/extensions/.CHAOS-testx
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/.CHAOS-testx
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_CHAOS.h" ] && echo "CHAOS"
Index: iptables-1.4.0/extensions/libxt_CHAOS.c
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_CHAOS.c
@@ -0,0 +1,114 @@
+/*
+ * CHAOS target for iptables
+ * Copyright © CC Computer Consultants GmbH, 2006 - 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License; either version
+ * 2 or 3 as published by the Free Software Foundation.
+ */
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <xtables.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_CHAOS.h>
+
+enum {
+ F_DELUDE = 1 << 0,
+ F_TARPIT = 1 << 1,
+};
+
+static const struct option chaos_tg_opts[] = {
+ {.name = "delude", .has_arg = false, .val = 'd'},
+ {.name = "tarpit", .has_arg = false, .val = 't'},
+ {},
+};
+
+static void chaos_tg_help(void)
+{
+ printf(
+ "CHAOS target v%s options:\n"
+ " --delude Enable DELUDE processing for TCP\n"
+ " --tarpit Enable TARPIT processing for TCP\n",
+ IPTABLES_VERSION);
+ return;
+}
+
+static int chaos_tg_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ struct xt_chaos_target_info *info = (void *)((*target)->data);
+ switch (c) {
+ case 'd':
+ info->variant = XTCHAOS_DELUDE;
+ *flags |= F_DELUDE;
+ return true;
+ case 't':
+ info->variant = XTCHAOS_TARPIT;
+ *flags |= F_TARPIT;
+ return true;
+ }
+ return false;
+}
+
+static void chaos_tg_check(unsigned int flags)
+{
+ if ((flags & (F_DELUDE | F_TARPIT)) == (F_DELUDE | F_TARPIT))
+ /* If flags == 0x03, both were specified, which should not be. */
+ exit_error(PARAMETER_PROBLEM,
+ "CHAOS: only one of --tarpit or --delude "
+ "may be specified");
+ return;
+}
+
+static void chaos_tg_print(const void *ip,
+ const struct xt_entry_target *target, int numeric)
+{
+ const struct xt_chaos_target_info *info = (const void *)target->data;
+ switch (info->variant) {
+ case XTCHAOS_DELUDE:
+ printf("DELUDE ");
+ break;
+ case XTCHAOS_TARPIT:
+ printf("TARPIT ");
+ break;
+ }
+ return;
+}
+
+static void chaos_tg_save(const void *ip, const struct xt_entry_target *target)
+{
+ const struct xt_chaos_target_info *info = (const void *)target->data;
+ switch (info->variant) {
+ case XTCHAOS_DELUDE:
+ printf("--delude ");
+ break;
+ case XTCHAOS_TARPIT:
+ printf("--tarpit ");
+ break;
+ }
+ return;
+}
+
+static struct xtables_target chaos_tg_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "CHAOS",
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct xt_chaos_target_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_chaos_target_info)),
+ .help = chaos_tg_help,
+ .parse = chaos_tg_parse,
+ .final_check = chaos_tg_check,
+ .print = chaos_tg_print,
+ .save = chaos_tg_save,
+ .extra_opts = chaos_tg_opts,
+};
+
+void _init(void)
+{
+ xtables_register_target(&chaos_tg_reg);
+ return;
+}
Index: iptables-1.4.0/extensions/libxt_CHAOS.man
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_CHAOS.man
@@ -0,0 +1,18 @@
+Causes confusion on the other end by doing odd things with incoming packets.
+CHAOS will randomly reply (or not) with one of its configurable subtargets:
+.TP
+\fB--delude\fR
+Use the REJECT and DELUDE targets as a base to do a sudden or deferred
+connection reset, fooling some network scanners to return non-deterministic
+(randomly open/closed) results, and in case it is deemed open, it is actually
+closed/filtered.
+.TP
+\fB--tarpit\fR
+Use the REJECT and TARPIT target as a base to hold the connection until it
+times out. This consumes conntrack entries when connection tracking is loaded
+(which usually is on most machines), and routers inbetween you and the Internet
+may fail to do their connection tracking if they have to handle more
+connections than they can.
+.PP
+The randomness factor of not replying vs. replying can be set during load-time
+of the xt_CHAOS module or during runtime in /sys/modules/xt_CHAOS/parameters.
Index: iptables-1.4.0/extensions/.DELUDE-testx
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/.DELUDE-testx
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+[ -f "$KERNEL_DIR/net/netfilter/xt_DELUDE.c" ] && echo "DELUDE"
Index: iptables-1.4.0/extensions/libxt_DELUDE.c
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_DELUDE.c
@@ -0,0 +1,49 @@
+/*
+ * DELUDE target for iptables
+ * Copyright © CC Computer Consultants GmbH, 2006 - 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License; either version
+ * 2 or 3 as published by the Free Software Foundation.
+ */
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <xtables.h>
+#include <linux/netfilter/x_tables.h>
+
+static void delude_tg_help(void)
+{
+ printf("DELUDE takes no options\n");
+ return;
+}
+
+static int delude_tg_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ return 0;
+}
+
+static void delude_tg_check(unsigned int flags)
+{
+ return;
+}
+
+static struct xtables_target delude_tg_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "DELUDE",
+ .family = AF_INET,
+ .size = XT_ALIGN(0),
+ .userspacesize = XT_ALIGN(0),
+ .help = delude_tg_help,
+ .parse = delude_tg_parse,
+ .final_check = delude_tg_check,
+};
+
+void _init(void)
+{
+ xtables_register_target(&delude_tg_reg);
+ return;
+}
Index: iptables-1.4.0/extensions/libxt_DELUDE.man
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_DELUDE.man
@@ -0,0 +1,4 @@
+The DELUDE target will reply to a SYN packet with SYN-ACK, and to all other
+packets with an RST. This will terminate the connection much like REJECT, but
+network scanners doing TCP half-open discovery can be spoofed to make them
+belive the port is open rather than closed/filtered.
Index: iptables-1.4.0/extensions/.portscan-testx
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/.portscan-testx
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+[ -f "$KERNEL_DIR/include/linux/netfilter/xt_portscan.h" ] && echo "portscan"
Index: iptables-1.4.0/extensions/libxt_portscan.c
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_portscan.c
@@ -0,0 +1,127 @@
+/*
+ * portscan match for iptables
+ * Copyright © CC Computer Consultants GmbH, 2006 - 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License; either version
+ * 2 or 3 as published by the Free Software Foundation.
+ */
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <iptables.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_portscan.h>
+
+static const struct option portscan_mt_opts[] = {
+ {.name = "stealth", .has_arg = false, .val = 'x'},
+ {.name = "synscan", .has_arg = false, .val = 's'},
+ {.name = "cnscan", .has_arg = false, .val = 'c'},
+ {.name = "grscan", .has_arg = false, .val = 'g'},
+ {},
+};
+
+static void portscan_mt_help(void)
+{
+ printf(
+ "portscan match v%s options:\n"
+ "(Combining them will make them match by OR-logic)\n"
+ " --stealth Match TCP Stealth packets\n"
+ " --synscan Match TCP SYN scans\n"
+ " --cnscan Match TCP Connect scans\n"
+ " --grscan Match Banner Grabbing scans\n",
+ IPTABLES_VERSION);
+ return;
+}
+
+static int portscan_mt_parse(int c, char **argv, int invert,
+ unsigned int *flags, const void *entry, struct xt_entry_match **match)
+{
+ struct xt_portscan_match_info *info = (void *)((*match)->data);
+
+ switch (c) {
+ case 'c':
+ info->match_cn = true;
+ return true;
+ case 'g':
+ info->match_gr = true;
+ return true;
+ case 's':
+ info->match_syn = true;
+ return true;
+ case 'x':
+ info->match_stealth = true;
+ return true;
+ }
+ return false;
+}
+
+static void portscan_mt_check(unsigned int flags)
+{
+ return;
+}
+
+static void portscan_mt_print(const void *ip,
+ const struct xt_entry_match *match, int numeric)
+{
+ const struct xt_portscan_match_info *info = (const void *)(match->data);
+ const char *s = "";
+
+ printf("portscan ");
+ if (info->match_stealth) {
+ printf("STEALTH");
+ s = ",";
+ }
+ if (info->match_syn) {
+ printf("%sSYNSCAN", s);
+ s = ",";
+ }
+ if (info->match_cn) {
+ printf("%sCNSCAN", s);
+ s = ",";
+ }
+ if (info->match_gr)
+ printf("%sGRSCAN", s);
+ printf(" ");
+ return;
+}
+
+static void portscan_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_portscan_match_info *info = (const void *)(match->data);
+
+ if (info->match_stealth)
+ printf("--stealth ");
+ if (info->match_syn)
+ printf("--synscan ");
+ if (info->match_cn)
+ printf("--cnscan ");
+ if (info->match_gr)
+ printf("--grscan ");
+ return;
+}
+
+static struct xtables_match portscan_mt_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "portscan",
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct xt_portscan_match_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_portscan_match_info)),
+ .help = portscan_mt_help,
+ .parse = portscan_mt_parse,
+ .final_check = portscan_mt_check,
+ .print = portscan_mt_print,
+ .save = portscan_mt_save,
+ .extra_opts = portscan_mt_opts,
+};
+
+void _init(void)
+{
+ xtables_register_match(&portscan_mt_reg);
+ return;
+}
Index: iptables-1.4.0/extensions/libxt_portscan.man
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_portscan.man
@@ -0,0 +1,27 @@
+Detects simple port scan attemps based upon the packet's contents. (This is
+different from other implementations, which also try to match the rate of new
+connections.) Note that an attempt is only discovered after it has been carried
+out, but this information can be used in conjunction with other rules to block
+the remote host's future connections. So this match module will match on the
+(probably) last packet the remote side will send to your machine.
+.TP
+\fB--stealth\fR
+Match if the packet did not belong to any known TCP connection
+(Stealth/FIN/XMAS/NULL scan).
+.TP
+\fB--synscan\fR
+Match if the connection was a TCP half-open discovery (SYN scan), i.e. the
+connection was torn down after the 2nd packet in the 3-way handshake.
+.TP
+\fB--cnscan\fR
+Match if the connection was a TCP full open discovery (connect scan), i.e. the
+connection was torn down after completion of the 3-way handshake.
+.TP
+\fB--grscan\fR
+Match if data in the connection only flew in the direction of the remote side,
+e.g. if the connection was terminated after a locally running daemon sent its
+identification. (e.g. openssh)
+.PP
+NOTE: Some clients (Windows XP for example) may do what looks like a SYN scan,
+so be advised to carefully use xt_portscan in conjunction with blocking rules,
+as it may lock out your very own internal network.

106
package/iptables/patches/1.4.0/007-tarpit_support.patch Normal file
View File

@ -0,0 +1,106 @@
Index: iptables-1.4.0/extensions/libxt_TARPIT.c
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_TARPIT.c
@@ -0,0 +1,55 @@
+/* Shared library add-on to iptables to add TARPIT target support */
+#include <stdio.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter/x_tables.h>
+
+static void TARPIT_help(void)
+{
+ fputs(
+"TARPIT takes no options\n"
+"\n", stdout);
+}
+
+static struct option TARPIT_opts[] = {
+ { 0 }
+};
+
+static int TARPIT_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ return 0;
+}
+
+static void TARPIT_final_check(unsigned int flags)
+{
+}
+
+static void TARPIT_print(const void *ip, const struct xt_entry_target *target,
+ int numeric)
+{
+}
+
+static void TARPIT_save(const void *ip, const struct xt_entry_target *target)
+{
+}
+
+static struct xtables_target tarpit_target = {
+ .family = AF_INET,
+ .name = "TARPIT",
+ .version = IPTABLES_VERSION,
+ .size = XT_ALIGN(0),
+ .userspacesize = XT_ALIGN(0),
+ .help = TARPIT_help,
+ .parse = TARPIT_parse,
+ .final_check = TARPIT_final_check,
+ .print = TARPIT_print,
+ .save = TARPIT_save,
+ .extra_opts = TARPIT_opts
+};
+
+void _init(void)
+{
+ xtables_register_target(&tarpit_target);
+}
Index: iptables-1.4.0/extensions/libxt_TARPIT.man
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/libxt_TARPIT.man
@@ -0,0 +1,34 @@
+Captures and holds incoming TCP connections using no local
+per-connection resources. Connections are accepted, but immediately
+switched to the persist state (0 byte window), in which the remote
+side stops sending data and asks to continue every 60-240 seconds.
+Attempts to close the connection are ignored, forcing the remote side
+to time out the connection in 12-24 minutes.
+
+This offers similar functionality to LaBrea
+<http://www.hackbusters.net/LaBrea/> but doesn't require dedicated
+hardware or IPs. Any TCP port that you would normally DROP or REJECT
+can instead become a tarpit.
+
+To tarpit connections to TCP port 80 destined for the current machine:
+.IP
+iptables -A INPUT -p tcp -m tcp --dport 80 -j TARPIT
+.P
+To significantly slow down Code Red/Nimda-style scans of unused address
+space, forward unused ip addresses to a Linux box not acting as a router
+(e.g. "ip route 10.0.0.0 255.0.0.0 ip.of.linux.box" on a Cisco), enable IP
+forwarding on the Linux box, and add:
+.IP
+iptables -A FORWARD -p tcp -j TARPIT
+.IP
+iptables -A FORWARD -j DROP
+.TP
+NOTE:
+If you use the conntrack module while you are using TARPIT, you should
+also use the NOTRACK target, or the kernel will unnecessarily allocate
+resources for each TARPITted connection. To TARPIT incoming
+connections to the standard IRC port while using conntrack, you could:
+.IP
+iptables -t raw -A PREROUTING -p tcp --dport 6667 -j NOTRACK
+.IP
+iptables -A INPUT -p tcp --dport 6667 -j TARPIT
Index: iptables-1.4.0/extensions/.TARPIT-testx
===================================================================
--- /dev/null
+++ iptables-1.4.0/extensions/.TARPIT-testx
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f "$KERNEL_DIR/net/netfilter/xt_TARPIT.c" ] && echo "TARPIT"

131
package/kernel/modules/netfilter.mk
View File

@ -1,4 +1,4 @@
#
#
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
@ -19,9 +19,9 @@ endef
define KernelPackage/ipt-conntrack/description
Netfilter (IPv4) kernel modules for connection tracking
Includes:
- ipt_conntrack
- ipt_helper
Includes:
- ipt_conntrack
- ipt_helper
- ipt_connmark/CONNMARK
endef
@ -37,9 +37,9 @@ define KernelPackage/ipt-filter
endef
define KernelPackage/ipt-filter/description
Netfilter (IPv4) kernel modules for packet content inspection
Includes:
- ipt_ipp2p
Netfilter (IPv4) kernel modules for packet content inspection
Includes:
- ipt_ipp2p
- ipt_layer7
endef
@ -55,16 +55,16 @@ define KernelPackage/ipt-ipopt
endef
define KernelPackage/ipt-ipopt/description
Netfilter (IPv4) modules for matching/changing IP packet options
Includes:
- ipt_CLASSIFY
- ipt_dscp/DSCP
- ipt_ecn/ECN
- ipt_length
- ipt_mac
- ipt_tos/TOS
- ipt_tcpmms
- ipt_ttl/TTL
Netfilter (IPv4) modules for matching/changing IP packet options
Includes:
- ipt_CLASSIFY
- ipt_dscp/DSCP
- ipt_ecn/ECN
- ipt_length
- ipt_mac
- ipt_tos/TOS
- ipt_tcpmms
- ipt_ttl/TTL
- ipt_unclean
endef
@ -80,9 +80,9 @@ define KernelPackage/ipt-ipsec
endef
define KernelPackage/ipt-ipsec/description
Netfilter (IPv4) modules for matching IPSec packets
Includes:
- ipt_ah
Netfilter (IPv4) modules for matching IPSec packets
Includes:
- ipt_ah
- ipt_esp
endef
@ -98,9 +98,9 @@ define KernelPackage/ipt-nat
endef
define KernelPackage/ipt-nat/description
Netfilter (IPv4) modules for extra NAT targets
Includes:
- ipt_REDIRECT
Netfilter (IPv4) modules for extra NAT targets
Includes:
- ipt_REDIRECT
- ipt_NETMAP
endef
@ -116,12 +116,12 @@ define KernelPackage/ipt-nathelper
endef
define KernelPackage/ipt-nathelper/description
Default Netfilter (IPv4) Conntrack and NAT helpers
Includes:
- ip_conntrack_ftp
- ip_nat_ftp
- ip_conntrack_irc
- ip_nat_irc
Default Netfilter (IPv4) Conntrack and NAT helpers
Includes:
- ip_conntrack_ftp
- ip_nat_ftp
- ip_conntrack_irc
- ip_nat_irc
- ip_conntrack_tftp
endef
@ -137,15 +137,15 @@ define KernelPackage/ipt-nathelper-extra
endef
define KernelPackage/ipt-nathelper-extra/description
Extra Netfilter (IPv4) Conntrack and NAT helpers
Includes:
- ip_conntrack_amanda
- ip_conntrack_proto_gre
- ip_nat_proto_gre
- ip_conntrack_pptp
- ip_nat_pptp
- ip_conntrack_sip
- ip_nat_sip
Extra Netfilter (IPv4) Conntrack and NAT helpers
Includes:
- ip_conntrack_amanda
- ip_conntrack_proto_gre
- ip_nat_proto_gre
- ip_conntrack_pptp
- ip_nat_pptp
- ip_conntrack_sip
- ip_nat_sip
- ip_nat_snmp_basic
endef
@ -176,8 +176,8 @@ define KernelPackage/ipt-queue
endef
define KernelPackage/ipt-queue/description
Netfilter (IPv4) module for user-space packet queueing
Includes:
Netfilter (IPv4) module for user-space packet queueing
Includes:
- ipt_QUEUE
endef
@ -193,8 +193,8 @@ define KernelPackage/ipt-ulog
endef
define KernelPackage/ipt-ulog/description
Netfilter (IPv4) module for user-space packet logging
Includes:
Netfilter (IPv4) module for user-space packet logging
Includes:
- ipt_ULOG
endef
@ -209,8 +209,8 @@ define KernelPackage/ipt-iprange
endef
define KernelPackage/ipt-iprange/description
Netfilter (IPv4) module for matching ip ranges
Includes:
Netfilter (IPv4) module for matching ip ranges
Includes:
- ipt_IPRANGE
endef
@ -227,17 +227,17 @@ endef
define KernelPackage/ipt-ipset/description
Netfilter kernel modules for ipset
Includes:
- ip_set
- ip_set_iphash
- ip_set_ipmap
- ip_set_ipporthash
- ip_set_iptree
Includes:
- ip_set
- ip_set_iphash
- ip_set_ipmap
- ip_set_ipporthash
- ip_set_iptree
- ip_set_iptreemap
- ip_set_macipmap
- ip_set_nethash
- ip_set_portmap
- ipt_set
- ip_set_macipmap
- ip_set_nethash
- ip_set_portmap
- ipt_set
- ipt_SET
endef
@ -254,17 +254,17 @@ endef
define KernelPackage/ipt-extra/description
Other Netfilter (IPv4) kernel modules
Includes:
- ipt_limit
- ipt_owner
- ipt_physdev
- ipt_pkttype
- ipt_recent
- iptable_raw
- xt_NOTRACK
- xt_TARPIT
- xt_DELUDE
- xt_CHAOS
Includes:
- ipt_limit
- ipt_owner
- ipt_physdev
- ipt_pkttype
- ipt_recent
- iptable_raw
- xt_NOTRACK
- xt_TARPIT
- xt_DELUDE
- xt_CHAOS
endef
$(eval $(call KernelPackage,ipt-extra))
@ -273,6 +273,7 @@ $(eval $(call KernelPackage,ipt-extra))
define KernelPackage/ip6tables
SUBMENU:=$(NF_MENU)
TITLE:=IPv6 modules
DEPENDS:=+kmod-ipv6
KCONFIG:=CONFIG_IP6_NF_IPTABLES
FILES:=$(foreach mod,$(IPT_IPV6-m),$(LINUX_DIR)/net/$(mod).$(LINUX_KMOD_SUFFIX))
AUTOLOAD:=$(call AutoLoad,40,$(notdir $(IPT_IPV6-m)))

4
target/linux/generic-2.4/patches/602-netfilter_layer7_2.1nbd.patch → target/linux/generic-2.4/patches/602-netfilter_layer7_2.17_with_pktmatch.patch
View File

@ -69,9 +69,9 @@ Index: linux-2.4.35.4/include/linux/netfilter_ipv4/ipt_layer7.h
+
+struct ipt_layer7_info {
+ char protocol[MAX_PROTOCOL_LEN];
+ char invert:1;
+ char pattern[MAX_PATTERN_LEN];
+ char pkt;
+ u_int8_t invert;
+ u_int8_t pkt;
+};
+
+#endif /* _IPT_LAYER7_H */

4
target/linux/generic-2.6/config-2.6.22
View File

@ -558,8 +558,6 @@ CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_HASHLIMIT=m
CONFIG_IP_NF_MATCH_IPP2P=m
CONFIG_IP_NF_MATCH_IPRANGE=m
CONFIG_IP_NF_MATCH_LAYER7=m
# CONFIG_IP_NF_MATCH_LAYER7_DEBUG is not set
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_SET=m
@ -745,6 +743,8 @@ CONFIG_NETFILTER_XT_MATCH_PORTSCAN=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=y
CONFIG_NETFILTER_XT_MATCH_LAYER7=m
# CONFIG_NETFILTER_XT_MATCH_LAYER7_DEBUG is not set
# CONFIG_NETFILTER_XT_MATCH_STATISTIC is not set
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m

4
target/linux/generic-2.6/config-default
View File

@ -533,8 +533,6 @@ CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_HASHLIMIT=m
CONFIG_IP_NF_MATCH_IPP2P=m
CONFIG_IP_NF_MATCH_IPRANGE=m
CONFIG_IP_NF_MATCH_LAYER7=m
# CONFIG_IP_NF_MATCH_LAYER7_DEBUG is not set
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_SET=m
@ -713,6 +711,8 @@ CONFIG_NETFILTER_XT_MATCH_PORTSCAN=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=y
CONFIG_NETFILTER_XT_MATCH_LAYER7=m
# CONFIG_NETFILTER_XT_MATCH_LAYER7_DEBUG is not set
# CONFIG_NETFILTER_XT_MATCH_STATISTIC is not set
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=y

769
target/linux/generic-2.6/patches-2.6.22/100-netfilter_layer7_2.9.patch → target/linux/generic-2.6/patches-2.6.22/100-netfilter_layer7_2.17.patch
View File

File diff suppressed because it is too large Load Diff

68
target/linux/generic-2.6/patches-2.6.22/101-netfilter_layer7_pktmatch.patch
View File

@ -1,36 +1,37 @@
Index: linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h
Index: linux-2.6.22.18/include/linux/netfilter/xt_layer7.h
===================================================================
--- linux-2.6.22-rc6.orig/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 03:23:28.597194750 +0200
+++ linux-2.6.22-rc6/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 03:23:44.730203000 +0200
@@ -21,6 +21,7 @@
--- linux-2.6.22.18.orig/include/linux/netfilter/xt_layer7.h
+++ linux-2.6.22.18/include/linux/netfilter/xt_layer7.h
@@ -8,6 +8,7 @@ struct xt_layer7_info {
char protocol[MAX_PROTOCOL_LEN];
char invert:1;
char pattern[MAX_PATTERN_LEN];
+ char pkt;
u_int8_t invert;
+ u_int8_t pkt;
};
#endif /* _IPT_LAYER7_H */
Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
#endif /* _XT_LAYER7_H */
Index: linux-2.6.22.18/net/netfilter/xt_layer7.c
===================================================================
--- linux-2.6.22-rc6.orig/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 03:23:28.609195500 +0200
+++ linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 03:23:54.234797000 +0200
@@ -300,33 +300,34 @@
--- linux-2.6.22.18.orig/net/netfilter/xt_layer7.c
+++ linux-2.6.22.18/net/netfilter/xt_layer7.c
@@ -297,34 +297,36 @@ static int match_no_append(struct nf_con
}
/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct nf_conn * master_conntrack,
- char * app_data, int appdatalen)
- char * app_data, int appdatalen)
+static int add_datastr(char *target, int offset, char *app_data, int len)
{
int length = 0, i;
- int oldlength = master_conntrack->layer7.app_data_len;
-
- // This is a fix for a race condition by Deti Fliegl. However, I'm not
- // clear on whether the race condition exists or whether this really
- // fixes it. I might just be being dense... Anyway, if it's not really
- // a fix, all it does is waste a very small amount of time.
- /* This is a fix for a race condition by Deti Fliegl. However, I'm not
- clear on whether the race condition exists or whether this really
- fixes it. I might just be being dense... Anyway, if it's not really
- a fix, all it does is waste a very small amount of time. */
- if(!master_conntrack->layer7.app_data) return 0;
+ if(!target) return 0;
+
+ if (!target) return 0;
/* Strip nulls. Make everything lower case (our regex lib doesn't
do case insensitivity). Add it to the end of the current data. */
@ -38,15 +39,16 @@ Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
- i < appdatalen; i++) {
+ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) {
if(app_data[i] != '\0') {
/* the kernel version of tolower mungs 'upper ascii' */
- master_conntrack->layer7.app_data[length+oldlength] =
+ target[length+offset] =
/* the kernel version of tolower mungs 'upper ascii' */
isascii(app_data[i])? tolower(app_data[i]) : app_data[i];
isascii(app_data[i])?
tolower(app_data[i]) : app_data[i];
length++;
}
}
+ target[length+offset] = '\0';
+
+
+ return length;
+}
@ -54,7 +56,7 @@ Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
- master_conntrack->layer7.app_data_len = length + oldlength;
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+ char * app_data, int appdatalen)
+{
+ int length;
@ -63,29 +65,29 @@ Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
return length;
}
@@ -343,7 +344,7 @@
@@ -411,7 +413,7 @@ match(const struct sk_buff *skbin,
const struct xt_layer7_info * info = matchinfo;
enum ip_conntrack_info master_ctinfo, ctinfo;
struct nf_conn *master_conntrack;
struct nf_conn *conntrack;
struct nf_conn *master_conntrack, *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -365,8 +366,8 @@
@@ -439,8 +441,8 @@ match(const struct sk_buff *skbin,
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
- if(TOTAL_PACKETS > num_packets ||
- master_conntrack->layer7.app_proto) {
+ if(!info->pkt && (TOTAL_PACKETS > num_packets ||
+ master_conntrack->layer7.app_proto)) {
+ master_conntrack->layer7.app_proto)) {
pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
@@ -396,6 +397,23 @@
pattern_result = match_no_append(conntrack, master_conntrack,
ctinfo, master_ctinfo, info);
@@ -473,6 +475,25 @@ match(const struct sk_buff *skbin,
/* the return value gets checked later, when we're ready to use it */
comppattern = compile_and_cache(info->pattern, info->protocol);
spin_unlock_bh(&list_lock);
+ if (info->pkt) {
+ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC);
@ -98,12 +100,14 @@ Index: linux-2.6.22-rc6/net/ipv4/netfilter/ipt_layer7.c
+ tmp_data[0] = '\0';
+ add_datastr(tmp_data, 0, app_data, appdatalen);
+ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0);
+
+ kfree(tmp_data);
+ tmp_data = NULL;
+ spin_unlock_bh(&l7_lock);
+
+ return (pattern_result ^ info->invert);
+ }
+
/* On the first packet of a connection, allocate space for app data */
write_lock(&ct_lock);
if(TOTAL_PACKETS == 1 && !skb->cb[0] && !master_conntrack->layer7.app_data) {
if(TOTAL_PACKETS == 1 && !skb->cb[0] &&
!master_conntrack->layer7.app_data){

39
target/linux/generic-2.6/patches-2.6.22/110-ipp2p_0.8.1rc1.patch
View File

@ -1,6 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_ipp2p.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_ipp2p.h 2007-05-26 20:21:54.586864296 +0200
Index: linux-2.6.22.18/include/linux/netfilter_ipv4/ipt_ipp2p.h
===================================================================
--- /dev/null
+++ linux-2.6.22.18/include/linux/netfilter_ipv4/ipt_ipp2p.h
@@ -0,0 +1,31 @@
+#ifndef __IPT_IPP2P_H
+#define __IPT_IPP2P_H
@ -33,9 +34,10 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.6.
+#define IPP2P_MUTE (1 << 14)
+#define IPP2P_WASTE (1 << 15)
+#define IPP2P_XDCC (1 << 16)
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_ipp2p.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_ipp2p.c 2007-05-26 20:21:54.587864144 +0200
Index: linux-2.6.22.18/net/ipv4/netfilter/ipt_ipp2p.c
===================================================================
--- /dev/null
+++ linux-2.6.22.18/net/ipv4/netfilter/ipt_ipp2p.c
@@ -0,0 +1,882 @@
+#if defined(MODVERSIONS)
+#include <linux/modversions.h>
@ -919,12 +921,13 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.21.1.dev/n
+module_exit(fini);
+
+
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig
--- linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig 2007-05-26 20:17:47.626407992 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig 2007-05-26 20:21:54.587864144 +0200
@@ -81,6 +81,12 @@
help
Say Y to get lots of debugging output.
Index: linux-2.6.22.18/net/ipv4/netfilter/Kconfig
===================================================================
--- linux-2.6.22.18.orig/net/ipv4/netfilter/Kconfig
+++ linux-2.6.22.18/net/ipv4/netfilter/Kconfig
@@ -63,6 +63,12 @@ config IP_NF_MATCH_IPRANGE
To compile it as a module, choose M here. If unsure, say N.
+config IP_NF_MATCH_IPP2P
+ tristate "IPP2P"
@ -935,15 +938,15 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/i
config IP_NF_MATCH_TOS
tristate "TOS match support"
depends on IP_NF_IPTABLES
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile
--- linux-2.6.21.1.old/net/ipv4/netfilter/Makefile 2007-05-26 20:17:47.638406168 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile 2007-05-26 20:21:54.588863992 +0200
@@ -49,7 +49,7 @@
Index: linux-2.6.22.18/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.6.22.18.orig/net/ipv4/netfilter/Makefile
+++ linux-2.6.22.18/net/ipv4/netfilter/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
-
+obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_layer7.o
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o

676
target/linux/generic-2.6/patches-2.6.22/170-netfilter_chaostables.patch → target/linux/generic-2.6/patches-2.6.22/170-netfilter_chaostables_0.8.patch
View File

File diff suppressed because it is too large Load Diff

22
target/linux/generic-2.6/patches-2.6.22/171-netfilter_tarpit.patch
View File

@ -1,7 +1,7 @@
Index: linux-2.6.22.4/net/netfilter/Kconfig
Index: linux-2.6.22.18/net/netfilter/Kconfig
===================================================================
--- linux-2.6.22.4.orig/net/netfilter/Kconfig
+++ linux-2.6.22.4/net/netfilter/Kconfig
--- linux-2.6.22.18.orig/net/netfilter/Kconfig
+++ linux-2.6.22.18/net/netfilter/Kconfig
@@ -379,6 +379,23 @@ config NETFILTER_XT_TARGET_CONNSECMARK
To compile it as a module, choose M here. If unsure, say N.
@ -26,22 +26,22 @@ Index: linux-2.6.22.4/net/netfilter/Kconfig
config NETFILTER_XT_TARGET_TCPMSS
tristate '"TCPMSS" target support'
depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
Index: linux-2.6.22.4/net/netfilter/Makefile
Index: linux-2.6.22.18/net/netfilter/Makefile
===================================================================
--- linux-2.6.22.4.orig/net/netfilter/Makefile
+++ linux-2.6.22.4/net/netfilter/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE
--- linux-2.6.22.18.orig/net/netfilter/Makefile
+++ linux-2.6.22.18/net/netfilter/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_TARPIT) += xt_TARPIT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
Index: linux-2.6.22.4/net/netfilter/xt_TARPIT.c
obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o
Index: linux-2.6.22.18/net/netfilter/xt_TARPIT.c
===================================================================
--- /dev/null
+++ linux-2.6.22.4/net/netfilter/xt_TARPIT.c
+++ linux-2.6.22.18/net/netfilter/xt_TARPIT.c
@@ -0,0 +1,280 @@
+/*
+ * Kernel module to capture and hold incoming TCP connections using
@ -284,7 +284,7 @@ Index: linux-2.6.22.4/net/netfilter/xt_TARPIT.c
+ return NF_DROP;
+}
+
+static bool xt_tarpit_check(const char *tablename, const void *entry,
+static int xt_tarpit_check(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
+{

113
target/linux/generic-2.6/patches-2.6.23/101-netfilter_layer7_pktmatch.patch Normal file
View File

@ -0,0 +1,113 @@
Index: linux-2.6.23.16/include/linux/netfilter/xt_layer7.h
===================================================================
--- linux-2.6.23.16.orig/include/linux/netfilter/xt_layer7.h
+++ linux-2.6.23.16/include/linux/netfilter/xt_layer7.h
@@ -8,6 +8,7 @@ struct xt_layer7_info {
char protocol[MAX_PROTOCOL_LEN];
char pattern[MAX_PATTERN_LEN];
u_int8_t invert;
+ u_int8_t pkt;
};
#endif /* _XT_LAYER7_H */
Index: linux-2.6.23.16/net/netfilter/xt_layer7.c
===================================================================
--- linux-2.6.23.16.orig/net/netfilter/xt_layer7.c
+++ linux-2.6.23.16/net/netfilter/xt_layer7.c
@@ -297,34 +297,36 @@ static int match_no_append(struct nf_con
}
/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct nf_conn * master_conntrack,
- char * app_data, int appdatalen)
+static int add_datastr(char *target, int offset, char *app_data, int len)
{
int length = 0, i;
- int oldlength = master_conntrack->layer7.app_data_len;
-
- /* This is a fix for a race condition by Deti Fliegl. However, I'm not
- clear on whether the race condition exists or whether this really
- fixes it. I might just be being dense... Anyway, if it's not really
- a fix, all it does is waste a very small amount of time. */
- if(!master_conntrack->layer7.app_data) return 0;
+
+ if (!target) return 0;
/* Strip nulls. Make everything lower case (our regex lib doesn't
do case insensitivity). Add it to the end of the current data. */
- for(i = 0; i < maxdatalen-oldlength-1 &&
- i < appdatalen; i++) {
+ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) {
if(app_data[i] != '\0') {
/* the kernel version of tolower mungs 'upper ascii' */
- master_conntrack->layer7.app_data[length+oldlength] =
+ target[length+offset] =
isascii(app_data[i])?
tolower(app_data[i]) : app_data[i];
length++;
}
}
+ target[length+offset] = '\0';
+
+ return length;
+}
- master_conntrack->layer7.app_data[length+oldlength] = '\0';
- master_conntrack->layer7.app_data_len = length + oldlength;
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+{
+ int length;
+ length = add_datastr(master_conntrack->layer7.app_data, master_conntrack->layer7.app_data_len, app_data, appdatalen);
+ master_conntrack->layer7.app_data_len += length;
return length;
}
@@ -411,7 +413,7 @@ match(const struct sk_buff *skbin,
const struct xt_layer7_info * info = matchinfo;
enum ip_conntrack_info master_ctinfo, ctinfo;
struct nf_conn *master_conntrack, *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -439,8 +441,8 @@ match(const struct sk_buff *skbin,
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
- if(TOTAL_PACKETS > num_packets ||
- master_conntrack->layer7.app_proto) {
+ if(!info->pkt && (TOTAL_PACKETS > num_packets ||
+ master_conntrack->layer7.app_proto)) {
pattern_result = match_no_append(conntrack, master_conntrack,
ctinfo, master_ctinfo, info);
@@ -473,6 +475,25 @@ match(const struct sk_buff *skbin,
/* the return value gets checked later, when we're ready to use it */
comppattern = compile_and_cache(info->pattern, info->protocol);
+ if (info->pkt) {
+ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC);
+ if(!tmp_data){
+ if (net_ratelimit())
+ printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
+ return info->invert;
+ }
+
+ tmp_data[0] = '\0';
+ add_datastr(tmp_data, 0, app_data, appdatalen);
+ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0);
+
+ kfree(tmp_data);
+ tmp_data = NULL;
+ spin_unlock_bh(&l7_lock);
+
+ return (pattern_result ^ info->invert);
+ }
+
/* On the first packet of a connection, allocate space for app data */
if(TOTAL_PACKETS == 1 && !skb->cb[0] &&
!master_conntrack->layer7.app_data){

654
target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables.patch → target/linux/generic-2.6/patches-2.6.23/170-netfilter_chaostables_0.8.patch
View File

File diff suppressed because it is too large Load Diff

20
target/linux/generic-2.6/patches-2.6.23/171-netfilter_tarpit.patch
View File

@ -1,7 +1,7 @@
Index: linux-2.6.23/net/netfilter/Kconfig
Index: linux-2.6.23.16/net/netfilter/Kconfig
===================================================================
--- linux-2.6.23.orig/net/netfilter/Kconfig
+++ linux-2.6.23/net/netfilter/Kconfig
--- linux-2.6.23.16.orig/net/netfilter/Kconfig
+++ linux-2.6.23.16/net/netfilter/Kconfig
@@ -401,6 +401,23 @@ config NETFILTER_XT_TARGET_CONNSECMARK
To compile it as a module, choose M here. If unsure, say N.
@ -26,22 +26,22 @@ Index: linux-2.6.23/net/netfilter/Kconfig
config NETFILTER_XT_TARGET_TCPMSS
tristate '"TCPMSS" target support'
depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
Index: linux-2.6.23/net/netfilter/Makefile
Index: linux-2.6.23.16/net/netfilter/Makefile
===================================================================
--- linux-2.6.23.orig/net/netfilter/Makefile
+++ linux-2.6.23/net/netfilter/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG)
--- linux-2.6.23.16.orig/net/netfilter/Makefile
+++ linux-2.6.23.16/net/netfilter/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG)
obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_TARPIT) += xt_TARPIT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
Index: linux-2.6.23/net/netfilter/xt_TARPIT.c
obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o
Index: linux-2.6.23.16/net/netfilter/xt_TARPIT.c
===================================================================
--- /dev/null
+++ linux-2.6.23/net/netfilter/xt_TARPIT.c
+++ linux-2.6.23.16/net/netfilter/xt_TARPIT.c
@@ -0,0 +1,280 @@
+/*
+ * Kernel module to capture and hold incoming TCP connections using

113
target/linux/generic-2.6/patches-2.6.24/101-netfilter_layer7_pktmatch.patch Normal file
View File

@ -0,0 +1,113 @@
Index: linux-2.6.24/include/linux/netfilter/xt_layer7.h
===================================================================
--- linux-2.6.24.orig/include/linux/netfilter/xt_layer7.h
+++ linux-2.6.24/include/linux/netfilter/xt_layer7.h
@@ -8,6 +8,7 @@ struct xt_layer7_info {
char protocol[MAX_PROTOCOL_LEN];
char pattern[MAX_PATTERN_LEN];
u_int8_t invert;
+ u_int8_t pkt;
};
#endif /* _XT_LAYER7_H */
Index: linux-2.6.24/net/netfilter/xt_layer7.c
===================================================================
--- linux-2.6.24.orig/net/netfilter/xt_layer7.c
+++ linux-2.6.24/net/netfilter/xt_layer7.c
@@ -297,34 +297,36 @@ static int match_no_append(struct nf_con
}
/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct nf_conn * master_conntrack,
- char * app_data, int appdatalen)
+static int add_datastr(char *target, int offset, char *app_data, int len)
{
int length = 0, i;
- int oldlength = master_conntrack->layer7.app_data_len;
-
- /* This is a fix for a race condition by Deti Fliegl. However, I'm not
- clear on whether the race condition exists or whether this really
- fixes it. I might just be being dense... Anyway, if it's not really
- a fix, all it does is waste a very small amount of time. */
- if(!master_conntrack->layer7.app_data) return 0;
+
+ if (!target) return 0;
/* Strip nulls. Make everything lower case (our regex lib doesn't
do case insensitivity). Add it to the end of the current data. */
- for(i = 0; i < maxdatalen-oldlength-1 &&
- i < appdatalen; i++) {
+ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) {
if(app_data[i] != '\0') {
/* the kernel version of tolower mungs 'upper ascii' */
- master_conntrack->layer7.app_data[length+oldlength] =
+ target[length+offset] =
isascii(app_data[i])?
tolower(app_data[i]) : app_data[i];
length++;
}
}
+ target[length+offset] = '\0';
+
+ return length;
+}
- master_conntrack->layer7.app_data[length+oldlength] = '\0';
- master_conntrack->layer7.app_data_len = length + oldlength;
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+{
+ int length;
+ length = add_datastr(master_conntrack->layer7.app_data, master_conntrack->layer7.app_data_len, app_data, appdatalen);
+ master_conntrack->layer7.app_data_len += length;
return length;
}
@@ -411,7 +413,7 @@ match(const struct sk_buff *skbin,
const struct xt_layer7_info * info = matchinfo;
enum ip_conntrack_info master_ctinfo, ctinfo;
struct nf_conn *master_conntrack, *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -439,8 +441,8 @@ match(const struct sk_buff *skbin,
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
- if(TOTAL_PACKETS > num_packets ||
- master_conntrack->layer7.app_proto) {
+ if(!info->pkt && (TOTAL_PACKETS > num_packets ||
+ master_conntrack->layer7.app_proto)) {
pattern_result = match_no_append(conntrack, master_conntrack,
ctinfo, master_ctinfo, info);
@@ -473,6 +475,25 @@ match(const struct sk_buff *skbin,
/* the return value gets checked later, when we're ready to use it */
comppattern = compile_and_cache(info->pattern, info->protocol);
+ if (info->pkt) {
+ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC);
+ if(!tmp_data){
+ if (net_ratelimit())
+ printk(KERN_ERR "layer7: out of memory in match, bailing.\n");
+ return info->invert;
+ }
+
+ tmp_data[0] = '\0';
+ add_datastr(tmp_data, 0, app_data, appdatalen);
+ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0);
+
+ kfree(tmp_data);
+ tmp_data = NULL;
+ spin_unlock_bh(&l7_lock);
+
+ return (pattern_result ^ info->invert);
+ }
+
/* On the first packet of a connection, allocate space for app data */
if(TOTAL_PACKETS == 1 && !skb->cb[0] &&
!master_conntrack->layer7.app_data){

633
target/linux/generic-2.6/patches-2.6.24/170-netfilter_chaostables.patch → target/linux/generic-2.6/patches-2.6.24/170-netfilter_chaostables_0.8.patch
View File

File diff suppressed because it is too large Load Diff

783
target/linux/generic-2.6/patches/100-netfilter_layer7_2.9.patch → target/linux/generic-2.6/patches/100-netfilter_layer7_2.17.patch
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File diff suppressed because it is too large Load Diff

83
target/linux/generic-2.6/patches/101-netfilter_layer7_pktmatch.patch
View File

@ -1,37 +1,37 @@
Index: linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h
Index: linux-2.6.21.7/include/linux/netfilter/xt_layer7.h
===================================================================
--- linux-2.6.21.5.orig/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 00:43:58.271086750 +0200
+++ linux-2.6.21.5/include/linux/netfilter_ipv4/ipt_layer7.h 2007-07-02 01:36:08.914739750 +0200
@@ -21,6 +21,7 @@
--- linux-2.6.21.7.orig/include/linux/netfilter/xt_layer7.h
+++ linux-2.6.21.7/include/linux/netfilter/xt_layer7.h
@@ -8,6 +8,7 @@ struct xt_layer7_info {
char protocol[MAX_PROTOCOL_LEN];
char invert:1;
char pattern[MAX_PATTERN_LEN];
+ char pkt;
u_int8_t invert;
+ u_int8_t pkt;
};
#endif /* _IPT_LAYER7_H */
Index: linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c
#endif /* _XT_LAYER7_H */
Index: linux-2.6.21.7/net/netfilter/xt_layer7.c
===================================================================
--- linux-2.6.21.5.orig/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 01:27:54.195821750 +0200
+++ linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c 2007-07-02 01:37:01.990056750 +0200
@@ -299,33 +299,34 @@
}
--- linux-2.6.21.7.orig/net/netfilter/xt_layer7.c
+++ linux-2.6.21.7/net/netfilter/xt_layer7.c
@@ -297,34 +297,36 @@ static int match_no_append(struct nf_con
}
-/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct ip_conntrack * master_conntrack,
- char * app_data, int appdatalen)
/* add the new app data to the conntrack. Return number of bytes added. */
-static int add_data(struct nf_conn * master_conntrack,
- char * app_data, int appdatalen)
+static int add_datastr(char *target, int offset, char *app_data, int len)
{
int length = 0, i;
- int oldlength = master_conntrack->layer7.app_data_len;
-
- // This is a fix for a race condition by Deti Fliegl. However, I'm not
- // clear on whether the race condition exists or whether this really
- // fixes it. I might just be being dense... Anyway, if it's not really
- // a fix, all it does is waste a very small amount of time.
- /* This is a fix for a race condition by Deti Fliegl. However, I'm not
- clear on whether the race condition exists or whether this really
- fixes it. I might just be being dense... Anyway, if it's not really
- a fix, all it does is waste a very small amount of time. */
- if(!master_conntrack->layer7.app_data) return 0;
+ if(!target) return 0;
+
+ if (!target) return 0;
/* Strip nulls. Make everything lower case (our regex lib doesn't
do case insensitivity). Add it to the end of the current data. */
@ -39,54 +39,55 @@ Index: linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c
- i < appdatalen; i++) {
+ for(i = 0; i < maxdatalen-offset-1 && i < len; i++) {
if(app_data[i] != '\0') {
/* the kernel version of tolower mungs 'upper ascii' */
- master_conntrack->layer7.app_data[length+oldlength] =
+ target[length+offset] =
/* the kernel version of tolower mungs 'upper ascii' */
isascii(app_data[i])? tolower(app_data[i]) : app_data[i];
isascii(app_data[i])?
tolower(app_data[i]) : app_data[i];
length++;
}
}
+ target[length+offset] = '\0';
+
+ return length;
+}
- master_conntrack->layer7.app_data[length+oldlength] = '\0';
- master_conntrack->layer7.app_data_len = length + oldlength;
+ return length;
+}
+
+/* add the new app data to the conntrack. Return number of bytes added. */
+static int add_data(struct ip_conntrack * master_conntrack,
+ char * app_data, int appdatalen)
+static int add_data(struct nf_conn * master_conntrack,
+ char * app_data, int appdatalen)
+{
+ int length;
+
+ length = add_datastr(master_conntrack->layer7.app_data, master_conntrack->layer7.app_data_len, app_data, appdatalen);
+ master_conntrack->layer7.app_data_len += length;
return length;
}
@@ -343,7 +344,7 @@
@@ -411,7 +413,7 @@ match(const struct sk_buff *skbin,
const struct xt_layer7_info * info = matchinfo;
enum ip_conntrack_info master_ctinfo, ctinfo;
struct nf_conn *master_conntrack;
struct ip_conntrack *conntrack;
struct nf_conn *master_conntrack, *conntrack;
- unsigned char * app_data;
+ unsigned char *app_data, *tmp_data;
unsigned int pattern_result, appdatalen;
regexp * comppattern;
@@ -365,8 +366,8 @@
@@ -439,8 +441,8 @@ match(const struct sk_buff *skbin,
master_conntrack = master_ct(master_conntrack);
/* if we've classified it or seen too many packets */
- if(TOTAL_PACKETS > num_packets ||
- master_conntrack->layer7.app_proto) {
+ if(!info->pkt && (TOTAL_PACKETS > num_packets ||
+ master_conntrack->layer7.app_proto)) {
+ master_conntrack->layer7.app_proto)) {
pattern_result = match_no_append(conntrack, master_conntrack, ctinfo, master_ctinfo, info);
@@ -396,6 +397,23 @@
pattern_result = match_no_append(conntrack, master_conntrack,
ctinfo, master_ctinfo, info);
@@ -473,6 +475,25 @@ match(const struct sk_buff *skbin,
/* the return value gets checked later, when we're ready to use it */
comppattern = compile_and_cache(info->pattern, info->protocol);
spin_unlock_bh(&list_lock);
+ if (info->pkt) {
+ tmp_data = kmalloc(maxdatalen, GFP_ATOMIC);
@ -99,12 +100,14 @@ Index: linux-2.6.21.5/net/ipv4/netfilter/ipt_layer7.c
+ tmp_data[0] = '\0';
+ add_datastr(tmp_data, 0, app_data, appdatalen);
+ pattern_result = ((comppattern && regexec(comppattern, tmp_data)) ? 1 : 0);
+
+ kfree(tmp_data);
+ tmp_data = NULL;
+ spin_unlock_bh(&l7_lock);
+
+ return (pattern_result ^ info->invert);
+ }
+
/* On the first packet of a connection, allocate space for app data */
write_lock(&ct_lock);
if(TOTAL_PACKETS == 1 && !skb->cb[0] && !master_conntrack->layer7.app_data) {
if(TOTAL_PACKETS == 1 && !skb->cb[0] &&
!master_conntrack->layer7.app_data){

41
target/linux/generic-2.6/patches/110-ipp2p_0.8.1rc1.patch
View File

@ -1,6 +1,7 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_ipp2p.h
--- linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter_ipv4/ipt_ipp2p.h 2007-05-26 20:21:54.586864296 +0200
Index: linux-2.6.21.7/include/linux/netfilter_ipv4/ipt_ipp2p.h
===================================================================
--- /dev/null
+++ linux-2.6.21.7/include/linux/netfilter_ipv4/ipt_ipp2p.h
@@ -0,0 +1,31 @@
+#ifndef __IPT_IPP2P_H
+#define __IPT_IPP2P_H
@ -33,9 +34,10 @@ diff -urN linux-2.6.21.1.old/include/linux/netfilter_ipv4/ipt_ipp2p.h linux-2.6.
+#define IPP2P_MUTE (1 << 14)
+#define IPP2P_WASTE (1 << 15)
+#define IPP2P_XDCC (1 << 16)
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_ipp2p.c
--- linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/ipt_ipp2p.c 2007-05-26 20:21:54.587864144 +0200
Index: linux-2.6.21.7/net/ipv4/netfilter/ipt_ipp2p.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/ipv4/netfilter/ipt_ipp2p.c
@@ -0,0 +1,882 @@
+#if defined(MODVERSIONS)
+#include <linux/modversions.h>
@ -782,7 +784,7 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.21.1.dev/n
+{
+ const struct ipt_p2p_info *info = matchinfo;
+ unsigned char *haystack;
+ struct iphdr *ip = skb->nh.iph;
+ struct iphdr *ip = ip_hdr(skb);
+ int p2p_result = 0, i = 0;
+// int head_len;
+ int hlen = ntohs(ip->tot_len)-(ip->ihl*4); /*hlen = packet-data length*/
@ -919,12 +921,13 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/ipt_ipp2p.c linux-2.6.21.1.dev/n
+module_exit(fini);
+
+
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig
--- linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig 2007-05-26 20:17:47.626407992 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Kconfig 2007-05-26 20:21:54.587864144 +0200
@@ -263,6 +263,12 @@
help
Say Y to get lots of debugging output.
Index: linux-2.6.21.7/net/ipv4/netfilter/Kconfig
===================================================================
--- linux-2.6.21.7.orig/net/ipv4/netfilter/Kconfig
+++ linux-2.6.21.7/net/ipv4/netfilter/Kconfig
@@ -245,6 +245,12 @@ config IP_NF_MATCH_IPRANGE
To compile it as a module, choose M here. If unsure, say N.
+config IP_NF_MATCH_IPP2P
+ tristate "IPP2P"
@ -935,15 +938,15 @@ diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Kconfig linux-2.6.21.1.dev/net/i
config IP_NF_MATCH_TOS
tristate "TOS match support"
depends on IP_NF_IPTABLES
diff -urN linux-2.6.21.1.old/net/ipv4/netfilter/Makefile linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile
--- linux-2.6.21.1.old/net/ipv4/netfilter/Makefile 2007-05-26 20:17:47.638406168 +0200
+++ linux-2.6.21.1.dev/net/ipv4/netfilter/Makefile 2007-05-26 20:21:54.588863992 +0200
@@ -91,7 +91,7 @@
Index: linux-2.6.21.7/net/ipv4/netfilter/Makefile
===================================================================
--- linux-2.6.21.7.orig/net/ipv4/netfilter/Makefile
+++ linux-2.6.21.7/net/ipv4/netfilter/Makefile
@@ -91,6 +91,7 @@ obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
-
+obj-$(CONFIG_IP_NF_MATCH_IPP2P) += ipt_ipp2p.o
obj-$(CONFIG_IP_NF_MATCH_LAYER7) += ipt_layer7.o
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o

946
target/linux/generic-2.6/patches/170-netfilter_chaostables.patch
View File

@ -1,946 +0,0 @@
diff -urN linux-2.6.21.1.old/include/linux/netfilter/oot_conntrack.h linux-2.6.21.1.dev/include/linux/netfilter/oot_conntrack.h
--- linux-2.6.21.1.old/include/linux/netfilter/oot_conntrack.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter/oot_conntrack.h 2007-05-26 20:40:10.922195992 +0200
@@ -0,0 +1,5 @@
+#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
+# include <linux/netfilter_ipv4/ip_conntrack.h>
+#else /* linux-2.6.20+ */
+# include <net/netfilter/nf_nat_rule.h>
+#endif
diff -urN linux-2.6.21.1.old/include/linux/netfilter/oot_trans.h linux-2.6.21.1.dev/include/linux/netfilter/oot_trans.h
--- linux-2.6.21.1.old/include/linux/netfilter/oot_trans.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter/oot_trans.h 2007-05-26 20:40:10.940193256 +0200
@@ -0,0 +1,14 @@
+/* Out of tree workarounds */
+#include <linux/version.h>
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
+# define HAVE_MATCHINFOSIZE 1
+# define HAVE_TARGUSERINFO 1
+# define HAVE_TARGINFOSIZE 1
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+# define nfmark mark
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 21)
+# define tcp_v4_check(tcph, tcph_sz, s, d, csp) \
+ tcp_v4_check((tcph_sz), (s), (d), (csp))
+#endif
diff -urN linux-2.6.21.1.old/include/linux/netfilter/xt_CHAOS.h linux-2.6.21.1.dev/include/linux/netfilter/xt_CHAOS.h
--- linux-2.6.21.1.old/include/linux/netfilter/xt_CHAOS.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter/xt_CHAOS.h 2007-05-26 20:40:10.940193256 +0200
@@ -0,0 +1,14 @@
+#ifndef _LINUX_XT_CHAOS_H
+#define _LINUX_XT_CHAOS_H 1
+
+enum xt_chaos_variant {
+ XTCHAOS_NORMAL,
+ XTCHAOS_TARPIT,
+ XTCHAOS_DELUDE,
+};
+
+struct xt_chaos_info {
+ enum xt_chaos_variant variant;
+};
+
+#endif /* _LINUX_XT_CHAOS_H */
diff -urN linux-2.6.21.1.old/include/linux/netfilter/xt_portscan.h linux-2.6.21.1.dev/include/linux/netfilter/xt_portscan.h
--- linux-2.6.21.1.old/include/linux/netfilter/xt_portscan.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/include/linux/netfilter/xt_portscan.h 2007-05-26 20:40:10.940193256 +0200
@@ -0,0 +1,8 @@
+#ifndef _LINUX_XT_PORTSCAN_H
+#define _LINUX_XT_PORTSCAN_H 1
+
+struct xt_portscan_info {
+ unsigned int match_stealth, match_syn, match_cn, match_gr;
+};
+
+#endif /* _LINUX_XT_PORTSCAN_H */
diff -urN linux-2.6.21.1.old/net/netfilter/find_match.c linux-2.6.21.1.dev/net/netfilter/find_match.c
--- linux-2.6.21.1.old/net/netfilter/find_match.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/netfilter/find_match.c 2007-05-26 20:40:10.970188696 +0200
@@ -0,0 +1,39 @@
+/*
+ xt_request_find_match
+ by Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+
+ Based upon linux-2.6.18.5/net/netfilter/x_tables.c:
+ Copyright (C) 2006-2006 Harald Welte <laforge@netfilter.org>
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation.
+*/
+#include <linux/err.h>
+#include <linux/netfilter_arp.h>
+#include <linux/socket.h>
+#include <linux/netfilter/x_tables.h>
+
+/*
+ * Yeah this code is sub-optimal, but the function is missing in
+ * mainline so far. -jengelh
+ */
+static struct xt_match *xt_request_find_match_lo(int af, const char *name,
+ u8 revision)
+{
+ static const char *const xt_prefix[] = {
+ [AF_INET] = "ip",
+ [AF_INET6] = "ip6",
+ [NF_ARP] = "arp",
+ };
+ struct xt_match *match;
+
+ match = try_then_request_module(xt_find_match(af, name, revision),
+ "%st_%s", xt_prefix[af], name);
+ if(IS_ERR(match) || match == NULL)
+ return NULL;
+
+ return match;
+}
+
+/* In case it goes into mainline, let this out-of-tree package compile */
+#define xt_request_find_match xt_request_find_match_lo
diff -urN linux-2.6.21.1.old/net/netfilter/Kconfig linux-2.6.21.1.dev/net/netfilter/Kconfig
--- linux-2.6.21.1.old/net/netfilter/Kconfig 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/netfilter/Kconfig 2007-05-26 20:40:11.003183680 +0200
@@ -287,6 +287,14 @@
# alphabetically ordered list of targets
+config NETFILTER_XT_TARGET_CHAOS
+ tristate '"CHAOS" target support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a `CHAOS' target.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_CLASSIFY
tristate '"CLASSIFY" target support'
depends on NETFILTER_XTABLES
@@ -315,6 +323,14 @@
<file:Documentation/modules.txt>. The module will be called
ipt_CONNMARK.o. If unsure, say `N'.
+config NETFILTER_XT_TARGET_DELUDE
+ tristate '"DELUDE" target support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a `DELUDE' target.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_DSCP
tristate '"DSCP" target support'
depends on NETFILTER_XTABLES
@@ -563,6 +579,14 @@
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_MATCH_PORTSCAN
+ tristate '"portscan" match support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a 'portscan' match support.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_MATCH_MULTIPORT
tristate "Multiple port match support"
depends on NETFILTER_XTABLES
diff -urN linux-2.6.21.1.old/net/netfilter/Makefile linux-2.6.21.1.dev/net/netfilter/Makefile
--- linux-2.6.21.1.old/net/netfilter/Makefile 2007-04-27 23:49:26.000000000 +0200
+++ linux-2.6.21.1.dev/net/netfilter/Makefile 2007-05-26 20:40:11.003183680 +0200
@@ -37,8 +37,10 @@
obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
# targets
+obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_DELUDE) += xt_DELUDE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
@@ -63,6 +65,7 @@
obj-$(CONFIG_NETFILTER_XT_MATCH_MARK) += xt_mark.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MULTIPORT) += xt_multiport.o
obj-$(CONFIG_NETFILTER_XT_MATCH_POLICY) += xt_policy.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_PORTSCAN) += xt_portscan.o
obj-$(CONFIG_NETFILTER_XT_MATCH_PKTTYPE) += xt_pkttype.o
obj-$(CONFIG_NETFILTER_XT_MATCH_QUOTA) += xt_quota.o
obj-$(CONFIG_NETFILTER_XT_MATCH_REALM) += xt_realm.o
diff -urN linux-2.6.21.1.old/net/netfilter/xt_CHAOS.c linux-2.6.21.1.dev/net/netfilter/xt_CHAOS.c
--- linux-2.6.21.1.old/net/netfilter/xt_CHAOS.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/netfilter/xt_CHAOS.c 2007-05-26 20:40:11.004183528 +0200
@@ -0,0 +1,204 @@
+/*
+ CHAOS target for netfilter
+
+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation.
+*/
+#include <linux/icmp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/stat.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_tcpudp.h>
+#include <linux/netfilter_ipv4/ipt_REJECT.h>
+#include <net/ip.h>
+#include <linux/netfilter/xt_CHAOS.h>
+#include "find_match.c"
+#include <linux/netfilter/oot_trans.h>
+#define PFX KBUILD_MODNAME ": "
+
+/* Module parameters */
+static unsigned int reject_percentage = ~0U * .01;
+static unsigned int delude_percentage = ~0U * .0101;
+module_param(reject_percentage, uint, S_IRUGO | S_IWUSR);
+module_param(delude_percentage, uint, S_IRUGO | S_IWUSR);
+
+/* References to other matches/targets */
+static struct xt_match *xm_tcp;
+static struct xt_target *xt_delude, *xt_reject, *xt_tarpit;
+
+static int have_delude, have_tarpit;
+
+/* Static data for other matches/targets */
+static const struct ipt_reject_info reject_params = {
+ .with = ICMP_HOST_UNREACH,
+};
+
+static const struct xt_tcp tcp_params = {
+ .spts = {0, ~0},
+ .dpts = {0, ~0},
+};
+
+/* CHAOS functions */
+static void xt_chaos_total(const struct xt_chaos_info *info,
+ struct sk_buff **pskb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum)
+{
+ const int protoff = 4 * (*pskb)->nh.iph->ihl;
+ const int offset = ntohs((*pskb)->nh.iph->frag_off) & IP_OFFSET;
+ const struct xt_target *destiny;
+ int hotdrop = 0, ret;
+
+ ret = xm_tcp->match(*pskb, in, out, xm_tcp, &tcp_params,
+ offset, protoff, &hotdrop);
+ if(!ret || hotdrop || (unsigned int)net_random() > delude_percentage)
+ return;
+
+ destiny = (info->variant == XTCHAOS_TARPIT) ? xt_tarpit : xt_delude;
+#ifdef HAVE_TARGUSERINFO
+ destiny->target(pskb, in, out, hooknum, destiny, NULL, NULL);
+#else
+ destiny->target(pskb, in, out, hooknum, destiny, NULL);
+#endif
+ return;
+}
+
+static unsigned int xt_chaos_target(struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ unsigned int hooknum, const struct xt_target *target, const void *targinfo
+#ifdef HAVE_TARGUSERINFO
+ ,
+ void *userinfo
+#endif
+ )
+{
+ /* Equivalent to:
+ * -A chaos -m statistic --mode random --probability \
+ * $reject_percentage -j REJECT --reject-with host-unreach;
+ * -A chaos -p tcp -m statistic --mode random --probability \
+ * $delude_percentage -j DELUDE;
+ * -A chaos -j DROP;
+ */
+ const struct xt_chaos_info *info = targinfo;
+
+ if((unsigned int)net_random() <= reject_percentage)
+#ifdef HAVE_TARGUSERINFO
+ return xt_reject->target(pskb, in, out, hooknum, target,
+ &reject_params, userinfo);
+#else
+ return xt_reject->target(pskb, in, out, hooknum, target,
+ &reject_params);
+#endif
+
+ /* TARPIT/DELUDE may not be called from the OUTPUT chain */
+ if((*pskb)->nh.iph->protocol == IPPROTO_TCP &&
+ info->variant != XTCHAOS_NORMAL && hooknum != NF_IP_LOCAL_OUT)
+ xt_chaos_total(info, pskb, in, out, hooknum);
+
+ return NF_DROP;
+}
+
+static int xt_chaos_checkentry(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+#ifdef HAVE_TARGINFOSIZE
+ unsigned int targinfosize,
+#endif
+ unsigned int hook_mask)
+{
+ const struct xt_chaos_info *info = targinfo;
+ if(info->variant == XTCHAOS_DELUDE && !have_delude) {
+ printk(KERN_WARNING PFX "Error: Cannot use --delude when "
+ "DELUDE module not available\n");
+ return 0;
+ }
+ if(info->variant == XTCHAOS_TARPIT && !have_tarpit) {
+ printk(KERN_WARNING PFX "Error: Cannot use --tarpit when "
+ "TARPIT module not available\n");
+ return 0;
+ }
+ return 1;
+}
+
+static struct xt_target xt_chaos_info = {
+ .name = "CHAOS",
+ .target = xt_chaos_target,
+ .checkentry = xt_chaos_checkentry,
+ .table = "filter",
+ .targetsize = sizeof(struct xt_chaos_info),
+ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) |
+ (1 << NF_IP_LOCAL_OUT),
+ .family = AF_INET,
+ .me = THIS_MODULE,
+};
+
+static int __init xt_chaos_init(void)
+{
+ int ret = -EINVAL;
+
+ xm_tcp = xt_request_find_match(AF_INET, "tcp", 0);
+ if(xm_tcp == NULL) {
+ printk(KERN_WARNING PFX "Error: Could not find or load "
+ "\"tcp\" match\n");
+ return -EINVAL;
+ }
+
+ xt_reject = xt_request_find_target(AF_INET, "REJECT", 0);
+ if(xt_reject == NULL) {
+ printk(KERN_WARNING PFX "Error: Could not find or load "
+ "\"REJECT\" target\n");
+ goto out2;
+ }
+
+ xt_tarpit = xt_request_find_target(AF_INET, "TARPIT", 0);
+ have_tarpit = xt_tarpit != NULL;
+ if(!have_tarpit)
+ printk(KERN_WARNING PFX "Warning: Could not find or load "
+ "\"TARPIT\" target\n");
+
+ xt_delude = xt_request_find_target(AF_INET, "DELUDE", 0);
+ have_delude = xt_delude != NULL;
+ if(!have_delude)
+ printk(KERN_WARNING PFX "Warning: Could not find or load "
+ "\"DELUDE\" target\n");
+
+ if((ret = xt_register_target(&xt_chaos_info)) != 0) {
+ printk(KERN_WARNING PFX "xt_register_target returned "
+ "error %d\n", ret);
+ goto out3;
+ }
+
+ return 0;
+
+ out3:
+ if(have_delude)
+ module_put(xt_delude->me);
+ if(have_tarpit)
+ module_put(xt_tarpit->me);
+ module_put(xt_reject->me);
+ out2:
+ module_put(xm_tcp->me);
+ return ret;
+}
+
+static void __exit xt_chaos_exit(void)
+{
+ xt_unregister_target(&xt_chaos_info);
+ module_put(xm_tcp->me);
+ module_put(xt_reject->me);
+ if(have_delude)
+ module_put(xt_delude->me);
+ if(have_tarpit)
+ module_put(xt_tarpit->me);
+ return;
+}
+
+module_init(xt_chaos_init);
+module_exit(xt_chaos_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>");
+MODULE_DESCRIPTION("netfilter CHAOS target");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_CHAOS");
diff -urN linux-2.6.21.1.old/net/netfilter/xt_DELUDE.c linux-2.6.21.1.dev/net/netfilter/xt_DELUDE.c
--- linux-2.6.21.1.old/net/netfilter/xt_DELUDE.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/netfilter/xt_DELUDE.c 2007-05-26 20:40:11.004183528 +0200
@@ -0,0 +1,288 @@
+/*
+ DELUDE target
+ Copyright © Jan Engelhardt <jengelh [at] gmx de>, 2007
+
+ Based upon linux-2.6.18.5/net/ipv4/netfilter/ipt_REJECT.c:
+ (C) 1999-2001 Paul `Rusty' Russell
+ (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+
+ xt_DELUDE acts like REJECT, but does reply with SYN-ACK on SYN.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation.
+*/
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/random.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <net/icmp.h>
+#include <net/ip.h>
+#include <net/tcp.h>
+#include <net/route.h>
+#include <net/dst.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#ifdef CONFIG_BRIDGE_NETFILTER
+# include <linux/netfilter_bridge.h>
+#endif
+#include <linux/netfilter/oot_trans.h>
+#define PFX KBUILD_MODNAME ": "
+
+static inline struct rtable *route_reverse(struct sk_buff *skb,
+ struct tcphdr *tcph, int hook)
+{
+ struct iphdr *iph = skb->nh.iph;
+ struct dst_entry *odst;
+ struct flowi fl = {};
+ struct rtable *rt;
+
+ /* We don't require ip forwarding to be enabled to be able to
+ * send a RST reply for bridged traffic. */
+ if (hook != NF_IP_FORWARD
+#ifdef CONFIG_BRIDGE_NETFILTER
+ || (skb->nf_bridge && skb->nf_bridge->mask & BRNF_BRIDGED)
+#endif
+ ) {
+ fl.nl_u.ip4_u.daddr = iph->saddr;
+ if (hook == NF_IP_LOCAL_IN)
+ fl.nl_u.ip4_u.saddr = iph->daddr;
+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
+
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return NULL;
+ } else {
+ /* non-local src, find valid iif to satisfy
+ * rp-filter when calling ip_route_input. */
+ fl.nl_u.ip4_u.daddr = iph->daddr;
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return NULL;
+
+ odst = skb->dst;
+ if (ip_route_input(skb, iph->saddr, iph->daddr,
+ RT_TOS(iph->tos), rt->u.dst.dev) != 0) {
+ dst_release(&rt->u.dst);
+ return NULL;
+ }
+ dst_release(&rt->u.dst);
+ rt = (struct rtable *)skb->dst;
+ skb->dst = odst;
+
+ fl.nl_u.ip4_u.daddr = iph->saddr;
+ fl.nl_u.ip4_u.saddr = iph->daddr;
+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
+ }
+
+ if (rt->u.dst.error) {
+ dst_release(&rt->u.dst);
+ return NULL;
+ }
+
+ fl.proto = IPPROTO_TCP;
+ fl.fl_ip_sport = tcph->dest;
+ fl.fl_ip_dport = tcph->source;
+
+ xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0);
+
+ return rt;
+}
+
+static void send_reset(struct sk_buff *oldskb, int hook)
+{
+ struct sk_buff *nskb;
+ struct iphdr *iph = oldskb->nh.iph;
+ struct tcphdr _otcph, *oth, *tcph;
+ __be16 tmp_port;
+ __be32 tmp_addr;
+ int needs_ack;
+ unsigned int addr_type;
+
+ /* IP header checks: fragment. */
+ if (oldskb->nh.iph->frag_off & htons(IP_OFFSET))
+ return;
+
+ oth = skb_header_pointer(oldskb, oldskb->nh.iph->ihl * 4,
+ sizeof(_otcph), &_otcph);
+ if (oth == NULL)
+ return;
+
+ /* No RST for RST. */
+ if (oth->rst)
+ return;
+
+ /* Check checksum */
+ if (nf_ip_checksum(oldskb, hook, iph->ihl * 4, IPPROTO_TCP))
+ return;
+
+ /* We need a linear, writeable skb. We also need to expand
+ headroom in case hh_len of incoming interface < hh_len of
+ outgoing interface */
+ nskb = skb_copy_expand(oldskb, LL_MAX_HEADER, skb_tailroom(oldskb),
+ GFP_ATOMIC);
+ if (!nskb)
+ return;
+
+ /* This packet will not be the same as the other: clear nf fields */
+ nf_reset(nskb);
+ nskb->nfmark = 0;
+ skb_init_secmark(nskb);
+
+ skb_shinfo(nskb)->gso_size = 0;
+ skb_shinfo(nskb)->gso_segs = 0;
+ skb_shinfo(nskb)->gso_type = 0;
+
+ tcph = (struct tcphdr *)((u_int32_t*)nskb->nh.iph + nskb->nh.iph->ihl);
+
+ /* Swap source and dest */
+ tmp_addr = nskb->nh.iph->saddr;
+ nskb->nh.iph->saddr = nskb->nh.iph->daddr;
+ nskb->nh.iph->daddr = tmp_addr;
+ tmp_port = tcph->source;
+ tcph->source = tcph->dest;
+ tcph->dest = tmp_port;
+
+ /* Truncate to length (no data) */
+ tcph->doff = sizeof(struct tcphdr)/4;
+ skb_trim(nskb, nskb->nh.iph->ihl*4 + sizeof(struct tcphdr));
+ nskb->nh.iph->tot_len = htons(nskb->len);
+
+ if(oth->syn && !oth->ack && !oth->rst && !oth->fin) {
+ /* DELUDE essential part */
+ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + oth->fin +
+ oldskb->len - oldskb->nh.iph->ihl * 4 -
+ (oth->doff << 2));
+ tcph->seq = htonl(secure_tcp_sequence_number(
+ nskb->nh.iph->saddr, nskb->nh.iph->daddr,
+ tcph->source, tcph->dest));
+ tcph->ack = 1;
+ } else {
+ if(!tcph->ack) {
+ needs_ack = 1;
+ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + oth->fin
+ + oldskb->len - oldskb->nh.iph->ihl*4
+ - (oth->doff<<2));
+ tcph->seq = 0;
+ } else {
+ needs_ack = 0;
+ tcph->seq = oth->ack_seq;
+ tcph->ack_seq = 0;
+ }
+
+ /* Reset flags */
+ ((u_int8_t *)tcph)[13] = 0;
+ tcph->rst = 1;
+ tcph->ack = needs_ack;
+ }
+
+
+ tcph->window = 0;
+ tcph->urg_ptr = 0;
+
+ /* Adjust TCP checksum */
+ tcph->check = 0;
+ tcph->check = tcp_v4_check(tcph, sizeof(struct tcphdr),
+ nskb->nh.iph->saddr,
+ nskb->nh.iph->daddr,
+ csum_partial((char *)tcph,
+ sizeof(struct tcphdr), 0));
+
+ /* Set DF, id = 0 */
+ nskb->nh.iph->frag_off = htons(IP_DF);
+ nskb->nh.iph->id = 0;
+
+ addr_type = RTN_UNSPEC;
+ if (hook != NF_IP_FORWARD
+#ifdef CONFIG_BRIDGE_NETFILTER
+ || (nskb->nf_bridge && nskb->nf_bridge->mask & BRNF_BRIDGED)
+#endif
+ )
+ addr_type = RTN_LOCAL;
+
+ if (ip_route_me_harder(&nskb, addr_type))
+ goto free_nskb;
+
+ nskb->ip_summed = CHECKSUM_NONE;
+
+ /* Adjust IP TTL */
+ nskb->nh.iph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
+
+ /* Adjust IP checksum */
+ nskb->nh.iph->check = 0;
+ nskb->nh.iph->check = ip_fast_csum((unsigned char *)nskb->nh.iph,
+ nskb->nh.iph->ihl);
+
+ /* "Never happens" */
+ if (nskb->len > dst_mtu(nskb->dst))
+ goto free_nskb;
+
+ nf_ct_attach(nskb, oldskb);
+
+ NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
+ dst_output);
+ return;
+
+ free_nskb:
+ kfree_skb(nskb);
+}
+
+static unsigned int xt_delude_target(struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ unsigned int hooknum, const struct xt_target *target, const void *targinfo
+#ifdef HAVE_TARGUSERINFO
+ ,
+ void *userinfo
+#endif
+ )
+{
+ /* WARNING: This code causes reentry within iptables.
+ This means that the iptables jump stack is now crap. We
+ must return an absolute verdict. --RR */
+ send_reset(*pskb, hooknum);
+ return NF_DROP;
+}
+
+static int xt_delude_check(const char *tablename, const void *e_void,
+ const struct xt_target *target, void *targinfo,
+#ifdef HAVE_TARGINFOSIZE
+ unsigned int targinfosize,
+#endif
+ unsigned int hook_mask)
+{
+ if(hook_mask & ~((1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD))) {
+ printk(KERN_WARNING PFX "DELUDE may not be used in chains "
+ "other than INPUT and FORWARD\n");
+ return 0;
+ }
+ return 1;
+}
+
+static struct xt_target xt_delude_info = {
+ .name = "DELUDE",
+ .target = xt_delude_target,
+ .checkentry = xt_delude_check,
+ .table = "filter",
+ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) |
+ (1 << NF_IP_LOCAL_OUT),
+ .proto = IPPROTO_TCP,
+ .family = AF_INET,
+ .me = THIS_MODULE,
+};
+
+static int __init xt_delude_init(void)
+{
+ return xt_register_target(&xt_delude_info);
+}
+
+static void __exit xt_delude_exit(void)
+{
+ xt_unregister_target(&xt_delude_info);
+}
+
+module_init(xt_delude_init);
+module_exit(xt_delude_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>");
+MODULE_DESCRIPTION("netfilter DELUDE target");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_DELUDE");
diff -urN linux-2.6.21.1.old/net/netfilter/xt_portscan.c linux-2.6.21.1.dev/net/netfilter/xt_portscan.c
--- linux-2.6.21.1.old/net/netfilter/xt_portscan.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.21.1.dev/net/netfilter/xt_portscan.c 2007-05-26 20:40:11.004183528 +0200
@@ -0,0 +1,272 @@
+/*
+ portscan match for netfilter
+
+ Written by Jan Engelhardt, 2006 - 2007
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation.
+*/
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/stat.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_tcpudp.h>
+#include <linux/netfilter/oot_conntrack.h>
+#include <linux/netfilter/xt_portscan.h>
+#include <linux/netfilter/oot_trans.h>
+#define PFX KBUILD_MODNAME ": "
+
+enum {
+ TCP_FLAGS_ALL3 = TCP_FLAG_FIN | TCP_FLAG_RST | TCP_FLAG_SYN,
+ TCP_FLAGS_ALL4 = TCP_FLAGS_ALL3 | TCP_FLAG_ACK,
+ TCP_FLAGS_ALL6 = TCP_FLAGS_ALL4 | TCP_FLAG_PSH | TCP_FLAG_URG,
+};
+
+/* Module parameters */
+static unsigned int
+ connmark_mask = ~0,
+ packet_mask = ~0,
+ mark_seen = 0x9,
+ mark_synrcv = 0x1,
+ mark_closed = 0x2,
+ mark_synscan = 0x3,
+ mark_estab1 = 0x4,
+ mark_estab2 = 0x5,
+ mark_cnscan = 0x6,
+ mark_grscan = 0x7,
+ mark_valid = 0x8;
+
+module_param(connmark_mask, uint, S_IRUGO | S_IWUSR);
+module_param(packet_mask, uint, S_IRUGO | S_IWUSR);
+module_param(mark_seen, uint, S_IRUGO | S_IWUSR);
+module_param(mark_synrcv, uint, S_IRUGO | S_IWUSR);
+module_param(mark_closed, uint, S_IRUGO | S_IWUSR);
+module_param(mark_synscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_estab1, uint, S_IRUGO | S_IWUSR);
+module_param(mark_estab2, uint, S_IRUGO | S_IWUSR);
+module_param(mark_cnscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_grscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_valid, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(connmark_mask, "only set specified bits in connection mark");
+MODULE_PARM_DESC(packet_mask, "only set specified bits in packet mark");
+MODULE_PARM_DESC(mark_seen, "nfmark value for packet-seen state");
+MODULE_PARM_DESC(mark_synrcv, "connmark value for SYN Received state");
+MODULE_PARM_DESC(mark_closed, "connmark value for closed state");
+MODULE_PARM_DESC(mark_synscan, "connmark value for SYN Scan state");
+MODULE_PARM_DESC(mark_estab1, "connmark value for Established-1 state");
+MODULE_PARM_DESC(mark_estab2, "connmark value for Established-2 state");
+MODULE_PARM_DESC(mark_cnscan, "connmark value for Connect Scan state");
+MODULE_PARM_DESC(mark_grscan, "connmark value for Grab Scan state");
+MODULE_PARM_DESC(mark_valid, "connmark value for Valid state");
+
+/* TCP flag functions */
+static inline int tflg_ack4(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_ACK;
+}
+
+static inline int tflg_ack6(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL6) == TCP_FLAG_ACK;
+}
+
+static inline int tflg_fin(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_FIN;
+}
+
+static inline int tflg_rst(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_RST;
+}
+
+static inline int tflg_rstack(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) ==
+ (TCP_FLAG_ACK | TCP_FLAG_RST);
+}
+
+static inline int tflg_syn(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_SYN;
+}
+
+static inline int tflg_synack(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) ==
+ (TCP_FLAG_SYN | TCP_FLAG_ACK);
+}
+
+/* portscan functions */
+static inline int xt_portscan_stealth(const struct tcphdr *th)
+{
+ /*
+ * "Connection refused" replies to our own probes must not be matched.
+ */
+ if(tflg_rstack(th))
+ return 0;
+
+ if(tflg_rst(th) && printk_ratelimit()) {
+ printk(KERN_WARNING PFX "Warning: Pure RST received\n");
+ return 0;
+ }
+
+ /*
+ * -p tcp ! --syn -m conntrack --ctstate INVALID: Looking for non-start
+ * packets that are not associated with any connection -- this will
+ * match most scan types (NULL, XMAS, FIN) and ridiculous flag
+ * combinations (SYN-RST, SYN-FIN, SYN-FIN-RST, FIN-RST, etc.).
+ */
+ return !tflg_syn(th);
+}
+
+static inline int xt_portscan_full(int mark, enum ip_conntrack_info ctstate,
+ int loopback, const struct tcphdr *tcph, int payload_len)
+{
+ if(mark == mark_estab2) {
+ /*
+ * -m connmark --mark $ESTAB2
+ */
+ if(tflg_ack4(tcph) && payload_len == 0)
+ return mark; /* keep mark */
+ else if(tflg_rst(tcph) || tflg_fin(tcph))
+ return mark_grscan;
+ else
+ return mark_valid;
+ } else if(mark == mark_estab1) {
+ /*
+ * -m connmark --mark $ESTAB1
+ */
+ if(tflg_rst(tcph) || tflg_fin(tcph))
+ return mark_cnscan;
+ else if(!loopback && tflg_ack4(tcph) && payload_len == 0)
+ return mark_estab2;
+ else
+ return mark_valid;
+ } else if(mark == mark_synrcv) {
+ /*
+ * -m connmark --mark $SYN
+ */
+ if(loopback && tflg_synack(tcph))
+ return mark; /* keep mark */
+ else if(loopback && tflg_rstack(tcph))
+ return mark_closed;
+ else if(tflg_ack6(tcph))
+ return mark_estab1;
+ else
+ return mark_synscan;
+ } else if(ctstate == IP_CT_NEW && tflg_syn(tcph)) {
+ /*
+ * -p tcp --syn --ctstate NEW
+ */
+ return mark_synrcv;
+ }
+ return mark;
+}
+
+static int xt_portscan_match(const struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ const struct xt_match *match, const void *matchinfo, int offset,
+ unsigned int protoff, int *hotdrop)
+{
+ const struct xt_portscan_info *info = matchinfo;
+ enum ip_conntrack_info ctstate;
+ struct ip_conntrack *ctdata;
+ const struct tcphdr *tcph;
+ struct tcphdr tcph_buf;
+
+ tcph = skb_header_pointer(skb, protoff, sizeof(tcph_buf), &tcph_buf);
+ if(tcph == NULL)
+ return 0;
+
+ /* Check for invalid packets: -m conntrack --ctstate INVALID */
+ if((ctdata = ip_conntrack_get(skb, &ctstate)) == NULL) {
+ if(info->match_stealth)
+ return xt_portscan_stealth(tcph);
+ /*
+ * If @ctdata is NULL, we cannot match the other scan
+ * types, return.
+ */
+ return 0;
+ }
+
+ /*
+ * If -m portscan was previously applied to this packet, the rules we
+ * simulate must not be run through again. And for speedup, do not call
+ * it either when the connection is already VALID.
+ */
+ if((ctdata->mark & connmark_mask) == mark_valid ||
+ (skb->nfmark & packet_mask) != mark_seen)
+ {
+ unsigned int n;
+ n = xt_portscan_full(ctdata->mark & connmark_mask, ctstate,
+ in == &loopback_dev, tcph,
+ skb->len - protoff - 4 * tcph->doff);
+
+ ctdata->mark = (ctdata->mark & ~connmark_mask) | n;
+ ((struct sk_buff *)skb)->nfmark =
+ (skb->nfmark & ~packet_mask) | mark_seen;
+ }
+
+ return (info->match_syn && ctdata->mark == mark_synscan) ||
+ (info->match_cn && ctdata->mark == mark_cnscan) ||
+ (info->match_gr && ctdata->mark == mark_grscan);
+}
+
+static int xt_portscan_checkentry(const char *tablename, const void *entry,
+ const struct xt_match *match, void *matchinfo,
+#ifdef HAVE_MATCHINFOSIZE
+ unsigned int matchinfosize,
+#endif
+ unsigned int hook_mask)
+{
+ const struct xt_portscan_info *info = matchinfo;
+#ifdef HAVE_MATCHINFOSIZE
+ if(matchinfosize != XT_ALIGN(sizeof(struct xt_portscan_info))) {
+ printk(KERN_WARNING PFX "matchinfosize %u != %Zu\n",
+ matchinfosize,
+ XT_ALIGN(sizeof(struct xt_portscan_info)));
+ return 0;
+ }
+#endif
+ if((info->match_stealth & ~1) || (info->match_syn & ~1) ||
+ (info->match_cn & ~1) || (info->match_gr & ~1)) {
+ printk(KERN_WARNING PFX "Invalid flags\n");
+ return 0;
+ }
+ return 1;
+}
+
+static struct xt_match xt_portscan = {
+ .name = "portscan",
+ .match = xt_portscan_match,
+ .checkentry = xt_portscan_checkentry,
+ .matchsize = sizeof(struct xt_portscan_info),
+ .proto = IPPROTO_TCP,
+ .family = AF_INET,
+ .me = THIS_MODULE,
+};
+
+static int __init xt_portscan_init(void)
+{
+ return xt_register_match(&xt_portscan);
+}
+
+static void __exit xt_portscan_exit(void)
+{
+ xt_unregister_match(&xt_portscan);
+ return;
+}
+
+module_init(xt_portscan_init);
+module_exit(xt_portscan_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>");
+MODULE_DESCRIPTION("netfilter portscan match module");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_portscan");

853
target/linux/generic-2.6/patches/170-netfilter_chaostables_0.8.patch Normal file
View File

@ -0,0 +1,853 @@
Index: linux-2.6.21.7/include/linux/netfilter/oot_conntrack.h
===================================================================
--- /dev/null
+++ linux-2.6.21.7/include/linux/netfilter/oot_conntrack.h
@@ -0,0 +1,5 @@
+#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
+# include <linux/netfilter_ipv4/ip_conntrack.h>
+#else /* linux-2.6.20+ */
+# include <net/netfilter/nf_nat_rule.h>
+#endif
Index: linux-2.6.21.7/include/linux/netfilter/oot_trans.h
===================================================================
--- /dev/null
+++ linux-2.6.21.7/include/linux/netfilter/oot_trans.h
@@ -0,0 +1,14 @@
+/* Out of tree workarounds */
+#include <linux/version.h>
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
+# define HAVE_MATCHINFOSIZE 1
+# define HAVE_TARGUSERINFO 1
+# define HAVE_TARGINFOSIZE 1
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+# define nfmark mark
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 21)
+# define tcp_v4_check(tcph, tcph_sz, s, d, csp) \
+ tcp_v4_check((tcph_sz), (s), (d), (csp))
+#endif
Index: linux-2.6.21.7/include/linux/netfilter/xt_CHAOS.h
===================================================================
--- /dev/null
+++ linux-2.6.21.7/include/linux/netfilter/xt_CHAOS.h
@@ -0,0 +1,14 @@
+#ifndef _LINUX_NETFILTER_XT_CHAOS_H
+#define _LINUX_NETFILTER_XT_CHAOS_H 1
+
+enum xt_chaos_target_variant {
+ XTCHAOS_NORMAL,
+ XTCHAOS_TARPIT,
+ XTCHAOS_DELUDE,
+};
+
+struct xt_chaos_target_info {
+ uint8_t variant;
+};
+
+#endif /* _LINUX_NETFILTER_XT_CHAOS_H */
Index: linux-2.6.21.7/include/linux/netfilter/xt_portscan.h
===================================================================
--- /dev/null
+++ linux-2.6.21.7/include/linux/netfilter/xt_portscan.h
@@ -0,0 +1,8 @@
+#ifndef _LINUX_NETFILTER_XT_PORTSCAN_H
+#define _LINUX_NETFILTER_XT_PORTSCAN_H 1
+
+struct xt_portscan_match_info {
+ uint8_t match_stealth, match_syn, match_cn, match_gr;
+};
+
+#endif /* _LINUX_NETFILTER_XT_PORTSCAN_H */
Index: linux-2.6.21.7/net/netfilter/find_match.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/netfilter/find_match.c
@@ -0,0 +1,39 @@
+/*
+ xt_request_find_match
+ by Jan Engelhardt <jengelh [at] gmx de>, 2006 - 2007
+
+ Based upon linux-2.6.18.5/net/netfilter/x_tables.c:
+ Copyright (C) 2006-2006 Harald Welte <laforge@netfilter.org>
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation.
+*/
+#include <linux/err.h>
+#include <linux/netfilter_arp.h>
+#include <linux/socket.h>
+#include <linux/netfilter/x_tables.h>
+
+/*
+ * Yeah this code is sub-optimal, but the function is missing in
+ * mainline so far. -jengelh
+ */
+static struct xt_match *xt_request_find_match_lo(int af, const char *name,
+ u8 revision)
+{
+ static const char *const xt_prefix[] = {
+ [AF_INET] = "ip",
+ [AF_INET6] = "ip6",
+ [NF_ARP] = "arp",
+ };
+ struct xt_match *match;
+
+ match = try_then_request_module(xt_find_match(af, name, revision),
+ "%st_%s", xt_prefix[af], name);
+ if (IS_ERR(match) || match == NULL)
+ return NULL;
+
+ return match;
+}
+
+/* In case it goes into mainline, let this out-of-tree package compile */
+#define xt_request_find_match xt_request_find_match_lo
Index: linux-2.6.21.7/net/netfilter/Kconfig
===================================================================
--- linux-2.6.21.7.orig/net/netfilter/Kconfig
+++ linux-2.6.21.7/net/netfilter/Kconfig
@@ -287,6 +287,14 @@ config NETFILTER_XTABLES
# alphabetically ordered list of targets
+config NETFILTER_XT_TARGET_CHAOS
+ tristate '"CHAOS" target support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a `CHAOS' target.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_CLASSIFY
tristate '"CLASSIFY" target support'
depends on NETFILTER_XTABLES
@@ -315,6 +323,14 @@ config NETFILTER_XT_TARGET_CONNMARK
<file:Documentation/modules.txt>. The module will be called
ipt_CONNMARK.o. If unsure, say `N'.
+config NETFILTER_XT_TARGET_DELUDE
+ tristate '"DELUDE" target support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a `DELUDE' target.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_DSCP
tristate '"DSCP" target support'
depends on NETFILTER_XTABLES
@@ -563,6 +579,14 @@ config NETFILTER_XT_MATCH_POLICY
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_MATCH_PORTSCAN
+ tristate '"portscan" match support'
+ depends on NETFILTER_XTABLES
+ help
+ This option adds a 'portscan' match support.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_MATCH_MULTIPORT
tristate "Multiple port match support"
depends on NETFILTER_XTABLES
Index: linux-2.6.21.7/net/netfilter/Makefile
===================================================================
--- linux-2.6.21.7.orig/net/netfilter/Makefile
+++ linux-2.6.21.7/net/netfilter/Makefile
@@ -47,6 +47,8 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_DELUDE) += xt_DELUDE.o
# matches
obj-$(CONFIG_NETFILTER_XT_MATCH_COMMENT) += xt_comment.o
@@ -74,3 +76,4 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_STRING)
obj-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) += xt_tcpmss.o
obj-$(CONFIG_NETFILTER_XT_MATCH_PHYSDEV) += xt_physdev.o
obj-$(CONFIG_NETFILTER_XT_MATCH_HASHLIMIT) += xt_hashlimit.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_PORTSCAN) += xt_portscan.o
Index: linux-2.6.21.7/net/netfilter/xt_CHAOS.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/netfilter/xt_CHAOS.c
@@ -0,0 +1,200 @@
+/*
+ * CHAOS target for netfilter
+ * Copyright © CC Computer Consultants GmbH, 2006 - 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License; either version
+ * 2 or 3 as published by the Free Software Foundation.
+ */
+#include <linux/icmp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/stat.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_tcpudp.h>
+#include <linux/netfilter_ipv4/ipt_REJECT.h>
+#include <net/ip.h>
+#if defined(_LOCAL)
+# include "xt_CHAOS.h"
+# include "find_match.c"
+#elif defined(CONFIG_NETFILTER_XT_TARGET_CHAOS) || \
+ defined(CONFIG_NETFILTER_XT_TARGET_CHAOS_MODULE)
+# include <linux/netfilter/xt_CHAOS.h>
+# include "find_match.c"
+#else
+# include "xt_CHAOS.h"
+# include "find_match.c"
+#endif
+#define PFX KBUILD_MODNAME ": "
+
+/* Module parameters */
+static unsigned int reject_percentage = ~0U * .01;
+static unsigned int delude_percentage = ~0U * .0101;
+module_param(reject_percentage, uint, S_IRUGO | S_IWUSR);
+module_param(delude_percentage, uint, S_IRUGO | S_IWUSR);
+
+/* References to other matches/targets */
+static struct xt_match *xm_tcp;
+static struct xt_target *xt_delude, *xt_reject, *xt_tarpit;
+
+static int have_delude, have_tarpit;
+
+/* Static data for other matches/targets */
+static const struct ipt_reject_info reject_params = {
+ .with = ICMP_HOST_UNREACH,
+};
+
+static const struct xt_tcp tcp_params = {
+ .spts = {0, ~0},
+ .dpts = {0, ~0},
+};
+
+/* CHAOS functions */
+static void xt_chaos_total(const struct xt_chaos_target_info *info,
+ struct sk_buff **pskb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum)
+{
+ const struct iphdr *iph = ip_hdr(*pskb);
+ const int protoff = 4 * iph->ihl;
+ const int offset = ntohs(iph->frag_off) & IP_OFFSET;
+ const struct xt_target *destiny;
+ int hotdrop = 0, ret;
+
+ ret = xm_tcp->match(*pskb, in, out, xm_tcp, &tcp_params,
+ offset, protoff, &hotdrop);
+ if (!ret || hotdrop || (unsigned int)net_random() > delude_percentage)
+ return;
+
+ destiny = (info->variant == XTCHAOS_TARPIT) ? xt_tarpit : xt_delude;
+ destiny->target(pskb, in, out, hooknum, destiny, NULL);
+ return;
+}
+
+static unsigned int chaos_tg(struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ unsigned int hooknum, const struct xt_target *target, const void *targinfo)
+{
+ /*
+ * Equivalent to:
+ * -A chaos -m statistic --mode random --probability \
+ * $reject_percentage -j REJECT --reject-with host-unreach;
+ * -A chaos -p tcp -m statistic --mode random --probability \
+ * $delude_percentage -j DELUDE;
+ * -A chaos -j DROP;
+ */
+ const struct xt_chaos_target_info *info = targinfo;
+ const struct iphdr *iph = ip_hdr(*pskb);
+
+ if ((unsigned int)net_random() <= reject_percentage)
+ return xt_reject->target(pskb, in, out, hooknum, target,
+ &reject_params);
+
+ /* TARPIT/DELUDE may not be called from the OUTPUT chain */
+ if (iph->protocol == IPPROTO_TCP &&
+ info->variant != XTCHAOS_NORMAL && hooknum != NF_IP_LOCAL_OUT)
+ xt_chaos_total(info, pskb, in, out, hooknum);
+
+ return NF_DROP;
+}
+
+static int chaos_tg_check(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo, unsigned int hook_mask)
+{
+ const struct xt_chaos_target_info *info = targinfo;
+
+ if (info->variant == XTCHAOS_DELUDE && !have_delude) {
+ printk(KERN_WARNING PFX "Error: Cannot use --delude when "
+ "DELUDE module not available\n");
+ return false;
+ }
+ if (info->variant == XTCHAOS_TARPIT && !have_tarpit) {
+ printk(KERN_WARNING PFX "Error: Cannot use --tarpit when "
+ "TARPIT module not available\n");
+ return false;
+ }
+
+ return true;
+}
+
+static struct xt_target chaos_tg_reg = {
+ .name = "CHAOS",
+ .family = AF_INET,
+ .table = "filter",
+ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD) |
+ (1 << NF_IP_LOCAL_OUT),
+ .checkentry = chaos_tg_check,
+ .target = chaos_tg,
+ .targetsize = sizeof(struct xt_chaos_target_info),
+ .me = THIS_MODULE,
+};
+
+static int __init chaos_tg_init(void)
+{
+ int ret = -EINVAL;
+
+ xm_tcp = xt_request_find_match(AF_INET, "tcp", 0);
+ if (xm_tcp == NULL) {
+ printk(KERN_WARNING PFX "Error: Could not find or load "
+ "\"tcp\" match\n");
+ return -EINVAL;
+ }
+
+ xt_reject = xt_request_find_target(AF_INET, "REJECT", 0);
+ if (xt_reject == NULL) {
+ printk(KERN_WARNING PFX "Error: Could not find or load "
+ "\"REJECT\" target\n");
+ goto out2;
+ }
+
+ xt_tarpit = xt_request_find_target(AF_INET, "TARPIT", 0);
+ have_tarpit = xt_tarpit != NULL;
+ if (!have_tarpit)
+ printk(KERN_WARNING PFX "Warning: Could not find or load "
+ "\"TARPIT\" target\n");
+
+ xt_delude = xt_request_find_target(AF_INET, "DELUDE", 0);
+ have_delude = xt_delude != NULL;
+ if (!have_delude)
+ printk(KERN_WARNING PFX "Warning: Could not find or load "
+ "\"DELUDE\" target\n");
+
+ if ((ret = xt_register_target(&chaos_tg_reg)) != 0) {
+ printk(KERN_WARNING PFX "xt_register_target returned "
+ "error %d\n", ret);
+ goto out3;
+ }
+
+ return 0;
+
+ out3:
+ if (have_delude)
+ module_put(xt_delude->me);
+ if (have_tarpit)
+ module_put(xt_tarpit->me);
+ module_put(xt_reject->me);
+ out2:
+ module_put(xm_tcp->me);
+ return ret;
+}
+
+static void __exit chaos_tg_exit(void)
+{
+ xt_unregister_target(&chaos_tg_reg);
+ module_put(xm_tcp->me);
+ module_put(xt_reject->me);
+ if (have_delude)
+ module_put(xt_delude->me);
+ if (have_tarpit)
+ module_put(xt_tarpit->me);
+ return;
+}
+
+module_init(chaos_tg_init);
+module_exit(chaos_tg_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
+MODULE_DESCRIPTION("netfilter \"CHAOS\" target");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_CHAOS");
Index: linux-2.6.21.7/net/netfilter/xt_DELUDE.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/netfilter/xt_DELUDE.c
@@ -0,0 +1,197 @@
+/*
+ * DELUDE target
+ * Copyright © CC Computer Consultants GmbH, 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * Based upon linux-2.6.18.5/net/ipv4/netfilter/ipt_REJECT.c:
+ * (C) 1999-2001 Paul `Rusty' Russell
+ * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * xt_DELUDE acts like REJECT, but does reply with SYN-ACK on SYN.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/netfilter/x_tables.h>
+#ifdef CONFIG_BRIDGE_NETFILTER
+# include <linux/netfilter_bridge.h>
+#endif
+#include <net/tcp.h>
+#define PFX KBUILD_MODNAME ": "
+
+static void delude_send_reset(struct sk_buff *oldskb, unsigned int hook)
+{
+ struct tcphdr _otcph, *oth, *tcph;
+ unsigned int addr_type;
+ struct sk_buff *nskb;
+ u_int16_t tmp_port;
+ u_int32_t tmp_addr;
+ struct iphdr *niph;
+ bool needs_ack;
+
+ /* IP header checks: fragment. */
+ if (ip_hdr(oldskb)->frag_off & htons(IP_OFFSET))
+ return;
+
+ oth = skb_header_pointer(oldskb, ip_hdrlen(oldskb),
+ sizeof(_otcph), &_otcph);
+ if (oth == NULL)
+ return;
+
+ /* No RST for RST. */
+ if (oth->rst)
+ return;
+
+ /* Check checksum */
+ if (nf_ip_checksum(oldskb, hook, ip_hdrlen(oldskb), IPPROTO_TCP))
+ return;
+
+ /* We need a linear, writeable skb. We also need to expand
+ headroom in case hh_len of incoming interface < hh_len of
+ outgoing interface */
+ nskb = skb_copy_expand(oldskb, LL_MAX_HEADER, skb_tailroom(oldskb),
+ GFP_ATOMIC);
+ if (!nskb)
+ return;
+
+ /* This packet will not be the same as the other: clear nf fields */
+ nf_reset(nskb);
+ nskb->mark = 0;
+ skb_init_secmark(nskb);
+
+ skb_shinfo(nskb)->gso_size = 0;
+ skb_shinfo(nskb)->gso_segs = 0;
+ skb_shinfo(nskb)->gso_type = 0;
+
+ tcph = (struct tcphdr *)(skb_network_header(nskb) + ip_hdrlen(nskb));
+
+ /* Swap source and dest */
+ niph = ip_hdr(nskb);
+ tmp_addr = niph->saddr;
+ niph->saddr = niph->daddr;
+ niph->daddr = tmp_addr;
+ tmp_port = tcph->source;
+ tcph->source = tcph->dest;
+ tcph->dest = tmp_port;
+
+ /* Truncate to length (no data) */
+ tcph->doff = sizeof(struct tcphdr) / 4;
+ skb_trim(nskb, ip_hdrlen(nskb) + sizeof(struct tcphdr));
+ niph->tot_len = htons(nskb->len);
+
+ if (oth->syn && !oth->ack && !oth->rst && !oth->fin) {
+ /* DELUDE essential part */
+ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn + oth->fin +
+ oldskb->len - ip_hdrlen(oldskb) -
+ (oth->doff << 2));
+ tcph->seq = false;
+ tcph->ack = true;
+ } else {
+ if (!tcph->ack) {
+ needs_ack = true;
+ tcph->ack_seq = htonl(ntohl(oth->seq) + oth->syn +
+ oth->fin + oldskb->len -
+ ip_hdrlen(oldskb) - (oth->doff<<2));
+ tcph->seq = false;
+ } else {
+ needs_ack = false;
+ tcph->seq = oth->ack_seq;
+ tcph->ack_seq = false;
+ }
+
+ /* Reset flags */
+ ((u_int8_t *)tcph)[13] = 0;
+ tcph->rst = true;
+ tcph->ack = needs_ack;
+ }
+
+ tcph->window = 0;
+ tcph->urg_ptr = 0;
+
+ /* Adjust TCP checksum */
+ tcph->check = 0;
+ tcph->check = tcp_v4_check(sizeof(struct tcphdr), niph->saddr,
+ niph->daddr, csum_partial((char *)tcph,
+ sizeof(struct tcphdr), 0));
+
+ /* Set DF, id = 0 */
+ niph->frag_off = htons(IP_DF);
+ niph->id = 0;
+
+ addr_type = RTN_UNSPEC;
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (hook != NF_IP_FORWARD || (nskb->nf_bridge != NULL &&
+ nskb->nf_bridge->mask & BRNF_BRIDGED))
+#else
+ if (hook != NF_IP_FORWARD)
+#endif
+ addr_type = RTN_LOCAL;
+
+ if (ip_route_me_harder(&nskb, addr_type))
+ goto free_nskb;
+
+ nskb->ip_summed = CHECKSUM_NONE;
+
+ /* Adjust IP TTL */
+ niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
+
+ /* Adjust IP checksum */
+ niph->check = 0;
+ niph->check = ip_fast_csum(skb_network_header(nskb), niph->ihl);
+
+ /* "Never happens" */
+ if (nskb->len > dst_mtu(nskb->dst))
+ goto free_nskb;
+
+ nf_ct_attach(nskb, oldskb);
+
+ NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
+ dst_output);
+ return;
+
+ free_nskb:
+ kfree_skb(nskb);
+}
+
+static unsigned int delude_tg(struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ unsigned int hooknum, const struct xt_target *target, const void *targinfo)
+{
+ /* WARNING: This code causes reentry within iptables.
+ This means that the iptables jump stack is now crap. We
+ must return an absolute verdict. --RR */
+ delude_send_reset(*pskb, hooknum);
+ return NF_DROP;
+}
+
+static struct xt_target delude_tg_reg = {
+ .name = "DELUDE",
+ .family = AF_INET,
+ .table = "filter",
+ .hooks = (1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD),
+ .target = delude_tg,
+ .proto = IPPROTO_TCP,
+ .me = THIS_MODULE,
+};
+
+static int __init delude_tg_init(void)
+{
+ return xt_register_target(&delude_tg_reg);
+}
+
+static void __exit delude_tg_exit(void)
+{
+ xt_unregister_target(&delude_tg_reg);
+}
+
+module_init(delude_tg_init);
+module_exit(delude_tg_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
+MODULE_DESCRIPTION("netfilter \"DELUDE\" target");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_DELUDE");
Index: linux-2.6.21.7/net/netfilter/xt_portscan.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/netfilter/xt_portscan.c
@@ -0,0 +1,269 @@
+/*
+ * portscan match for netfilter
+ * Copyright © CC Computer Consultants GmbH, 2006 - 2007
+ * Contact: Jan Engelhardt <jengelh@computergmbh.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License; either version
+ * 2 or 3 as published by the Free Software Foundation.
+ */
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/skbuff.h>
+#include <linux/stat.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_tcpudp.h>
+#include <net/netfilter/nf_nat_rule.h>
+#if defined(_LOCAL)
+# include "xt_portscan.h"
+#elif defined(CONFIG_NETFILTER_XT_MATCH_PORTSCAN) || \
+ defined(CONFIG_NETFILTER_XT_MATCH_PORTSCAN_MODULE)
+# include <linux/netfilter/xt_portscan.h>
+#else
+# include "xt_portscan.h"
+#endif
+#define PFX KBUILD_MODNAME ": "
+
+enum {
+ TCP_FLAGS_ALL3 = TCP_FLAG_FIN | TCP_FLAG_RST | TCP_FLAG_SYN,
+ TCP_FLAGS_ALL4 = TCP_FLAGS_ALL3 | TCP_FLAG_ACK,
+ TCP_FLAGS_ALL6 = TCP_FLAGS_ALL4 | TCP_FLAG_PSH | TCP_FLAG_URG,
+};
+
+/* Module parameters */
+static unsigned int
+ connmark_mask = ~0,
+ packet_mask = ~0,
+ mark_seen = 0x9,
+ mark_synrcv = 0x1,
+ mark_closed = 0x2,
+ mark_synscan = 0x3,
+ mark_estab1 = 0x4,
+ mark_estab2 = 0x5,
+ mark_cnscan = 0x6,
+ mark_grscan = 0x7,
+ mark_valid = 0x8;
+
+module_param(connmark_mask, uint, S_IRUGO | S_IWUSR);
+module_param(packet_mask, uint, S_IRUGO | S_IWUSR);
+module_param(mark_seen, uint, S_IRUGO | S_IWUSR);
+module_param(mark_synrcv, uint, S_IRUGO | S_IWUSR);
+module_param(mark_closed, uint, S_IRUGO | S_IWUSR);
+module_param(mark_synscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_estab1, uint, S_IRUGO | S_IWUSR);
+module_param(mark_estab2, uint, S_IRUGO | S_IWUSR);
+module_param(mark_cnscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_grscan, uint, S_IRUGO | S_IWUSR);
+module_param(mark_valid, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(connmark_mask, "only set specified bits in connection mark");
+MODULE_PARM_DESC(packet_mask, "only set specified bits in packet mark");
+MODULE_PARM_DESC(mark_seen, "nfmark value for packet-seen state");
+MODULE_PARM_DESC(mark_synrcv, "connmark value for SYN Received state");
+MODULE_PARM_DESC(mark_closed, "connmark value for closed state");
+MODULE_PARM_DESC(mark_synscan, "connmark value for SYN Scan state");
+MODULE_PARM_DESC(mark_estab1, "connmark value for Established-1 state");
+MODULE_PARM_DESC(mark_estab2, "connmark value for Established-2 state");
+MODULE_PARM_DESC(mark_cnscan, "connmark value for Connect Scan state");
+MODULE_PARM_DESC(mark_grscan, "connmark value for Grab Scan state");
+MODULE_PARM_DESC(mark_valid, "connmark value for Valid state");
+
+/* TCP flag functions */
+static inline bool tflg_ack4(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_ACK;
+}
+
+static inline bool tflg_ack6(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL6) == TCP_FLAG_ACK;
+}
+
+static inline bool tflg_fin(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_FIN;
+}
+
+static inline bool tflg_rst(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL3) == TCP_FLAG_RST;
+}
+
+static inline bool tflg_rstack(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) ==
+ (TCP_FLAG_ACK | TCP_FLAG_RST);
+}
+
+static inline bool tflg_syn(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) == TCP_FLAG_SYN;
+}
+
+static inline bool tflg_synack(const struct tcphdr *th)
+{
+ return (tcp_flag_word(th) & TCP_FLAGS_ALL4) ==
+ (TCP_FLAG_SYN | TCP_FLAG_ACK);
+}
+
+/* portscan functions */
+static inline bool portscan_mt_stealth(const struct tcphdr *th)
+{
+ /*
+ * "Connection refused" replies to our own probes must not be matched.
+ */
+ if (tflg_rstack(th))
+ return false;
+
+ if (tflg_rst(th) && printk_ratelimit()) {
+ printk(KERN_WARNING PFX "Warning: Pure RST received\n");
+ return false;
+ }
+
+ /*
+ * -p tcp ! --syn -m conntrack --ctstate INVALID: Looking for non-start
+ * packets that are not associated with any connection -- this will
+ * match most scan types (NULL, XMAS, FIN) and ridiculous flag
+ * combinations (SYN-RST, SYN-FIN, SYN-FIN-RST, FIN-RST, etc.).
+ */
+ return !tflg_syn(th);
+}
+
+static inline unsigned int portscan_mt_full(int mark,
+ enum ip_conntrack_info ctstate, bool loopback, const struct tcphdr *tcph,
+ unsigned int payload_len)
+{
+ if (mark == mark_estab2) {
+ /*
+ * -m connmark --mark $ESTAB2
+ */
+ if (tflg_ack4(tcph) && payload_len == 0)
+ return mark; /* keep mark */
+ else if (tflg_rst(tcph) || tflg_fin(tcph))
+ return mark_grscan;
+ else
+ return mark_valid;
+ } else if (mark == mark_estab1) {
+ /*
+ * -m connmark --mark $ESTAB1
+ */
+ if (tflg_rst(tcph) || tflg_fin(tcph))
+ return mark_cnscan;
+ else if (!loopback && tflg_ack4(tcph) && payload_len == 0)
+ return mark_estab2;
+ else
+ return mark_valid;
+ } else if (mark == mark_synrcv) {
+ /*
+ * -m connmark --mark $SYN
+ */
+ if (loopback && tflg_synack(tcph))
+ return mark; /* keep mark */
+ else if (loopback && tflg_rstack(tcph))
+ return mark_closed;
+ else if (tflg_ack6(tcph))
+ return mark_estab1;
+ else
+ return mark_synscan;
+ } else if (ctstate == IP_CT_NEW && tflg_syn(tcph)) {
+ /*
+ * -p tcp --syn --ctstate NEW
+ */
+ return mark_synrcv;
+ }
+ return mark;
+}
+
+static int portscan_mt(const struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ const struct xt_match *match, const void *matchinfo, int offset,
+ unsigned int protoff, int *hotdrop)
+{
+ const struct xt_portscan_match_info *info = matchinfo;
+ enum ip_conntrack_info ctstate;
+ const struct tcphdr *tcph;
+ struct nf_conn *ctdata;
+ struct tcphdr tcph_buf;
+
+ tcph = skb_header_pointer(skb, protoff, sizeof(tcph_buf), &tcph_buf);
+ if (tcph == NULL)
+ return false;
+
+ /* Check for invalid packets: -m conntrack --ctstate INVALID */
+ if ((ctdata = nf_ct_get(skb, &ctstate)) == NULL) {
+ if (info->match_stealth)
+ return portscan_mt_stealth(tcph);
+ /*
+ * If @ctdata is NULL, we cannot match the other scan
+ * types, return.
+ */
+ return false;
+ }
+
+ /*
+ * If -m portscan was previously applied to this packet, the rules we
+ * simulate must not be run through again. And for speedup, do not call
+ * it either when the connection is already VALID.
+ */
+ if ((ctdata->mark & connmark_mask) == mark_valid ||
+ (skb->mark & packet_mask) != mark_seen) {
+ unsigned int n;
+
+ n = portscan_mt_full(ctdata->mark & connmark_mask, ctstate,
+ in == &loopback_dev, tcph,
+ skb->len - protoff - 4 * tcph->doff);
+
+ ctdata->mark = (ctdata->mark & ~connmark_mask) | n;
+ ((struct sk_buff *)skb)->mark =
+ (skb->mark & ~packet_mask) ^ mark_seen;
+ }
+
+ return (info->match_syn && ctdata->mark == mark_synscan) ||
+ (info->match_cn && ctdata->mark == mark_cnscan) ||
+ (info->match_gr && ctdata->mark == mark_grscan);
+}
+
+static int portscan_mt_check(const char *tablename, const void *entry,
+ const struct xt_match *match, void *matchinfo, unsigned int hook_mask)
+{
+ const struct xt_portscan_match_info *info = matchinfo;
+
+ if ((info->match_stealth & ~1) || (info->match_syn & ~1) ||
+ (info->match_cn & ~1) || (info->match_gr & ~1)) {
+ printk(KERN_WARNING PFX "Invalid flags\n");
+ return false;
+ }
+ return true;
+}
+
+static struct xt_match portscan_mt_reg __read_mostly = {
+ .name = "portscan",
+ .family = AF_INET,
+ .match = portscan_mt,
+ .checkentry = portscan_mt_check,
+ .matchsize = sizeof(struct xt_portscan_match_info),
+ .proto = IPPROTO_TCP,
+ .me = THIS_MODULE,
+};
+
+static int __init portscan_mt_init(void)
+{
+ return xt_register_match(&portscan_mt_reg);
+}
+
+static void __exit portscan_mt_exit(void)
+{
+ xt_unregister_match(&portscan_mt_reg);
+ return;
+}
+
+module_init(portscan_mt_init);
+module_exit(portscan_mt_exit);
+MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
+MODULE_DESCRIPTION("netfilter \"portscan\" match");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_portscan");

325
target/linux/generic-2.6/patches/171-netfilter_tarpit.patch Normal file
View File

@ -0,0 +1,325 @@
Index: linux-2.6.21.7/net/netfilter/Kconfig
===================================================================
--- linux-2.6.21.7.orig/net/netfilter/Kconfig
+++ linux-2.6.21.7/net/netfilter/Kconfig
@@ -414,6 +414,23 @@ config NETFILTER_XT_TARGET_CONNSECMARK
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_TARGET_TARPIT
+ tristate '"TARPIT" target support'
+ depends on NETFILTER_XTABLES
+ ---help---
+ Adds a TARPIT target to iptables, which captures and holds
+ incoming TCP connections using no local per-connection resources.
+ Connections are accepted, but immediately switched to the persist
+ state (0 byte window), in which the remote side stops sending data
+ and asks to continue every 60-240 seconds. Attempts to close the
+ connection are ignored, forcing the remote side to time out the
+ connection in 12-24 minutes.
+
+ This offers similar functionality to LaBrea
+ <http://www.hackbusters.net/LaBrea/>, but does not require dedicated
+ hardware or IPs. Any TCP port that you would normally DROP or REJECT
+ can instead become a tarpit.
+
config NETFILTER_XT_TARGET_TCPMSS
tristate '"TCPMSS" target support'
depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
Index: linux-2.6.21.7/net/netfilter/Makefile
===================================================================
--- linux-2.6.21.7.orig/net/netfilter/Makefile
+++ linux-2.6.21.7/net/netfilter/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_TARPIT) += xt_TARPIT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CHAOS) += xt_CHAOS.o
Index: linux-2.6.21.7/net/netfilter/xt_TARPIT.c
===================================================================
--- /dev/null
+++ linux-2.6.21.7/net/netfilter/xt_TARPIT.c
@@ -0,0 +1,280 @@
+/*
+ * Kernel module to capture and hold incoming TCP connections using
+ * no local per-connection resources.
+ *
+ * Based on ipt_REJECT.c and offering functionality similar to
+ * LaBrea <http://www.hackbusters.net/LaBrea/>.
+ *
+ * Copyright (c) 2002 Aaron Hopkins <tools@die.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Goal:
+ * - Allow incoming TCP connections to be established.
+ * - Passing data should result in the connection being switched to the
+ * persist state (0 byte window), in which the remote side stops sending
+ * data and asks to continue every 60 seconds.
+ * - Attempts to shut down the connection should be ignored completely, so
+ * the remote side ends up having to time it out.
+ *
+ * This means:
+ * - Reply to TCP SYN,!ACK,!RST,!FIN with SYN-ACK, window 5 bytes
+ * - Reply to TCP SYN,ACK,!RST,!FIN with RST to prevent spoofing
+ * - Reply to TCP !SYN,!RST,!FIN with ACK, window 0 bytes, rate-limited
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/ip.h>
+#include <net/tcp.h>
+#include <net/icmp.h>
+struct in_device;
+#include <net/route.h>
+#include <linux/random.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+/* Stolen from ip_finish_output2 */
+static int ip_direct_send(struct sk_buff *skb)
+{
+ struct dst_entry *dst = skb->dst;
+
+ if (dst->hh != NULL)
+ return neigh_hh_output(dst->hh, skb);
+ else if (dst->neighbour != NULL)
+ return dst->neighbour->output(skb);
+
+ if (net_ratelimit())
+ printk(KERN_DEBUG "TARPIT ip_direct_send: no header cache and no neighbor!\n");
+
+ kfree_skb(skb);
+ return -EINVAL;
+}
+
+
+/* Send reply */
+static void tarpit_tcp(const struct sk_buff *oskb, struct rtable *ort,
+ unsigned int local)
+{
+ struct sk_buff *nskb;
+ struct rtable *nrt;
+ struct tcphdr *otcph, *ntcph;
+ struct flowi fl = {};
+ unsigned int otcplen;
+ u_int16_t tmp;
+
+ const struct iphdr *oiph = ip_hdr(oskb);
+ struct iphdr *niph;
+
+ /* A truncated TCP header is not going to be useful */
+ if (oskb->len < ip_hdrlen(oskb) + sizeof(struct tcphdr))
+ return;
+
+ otcph = (void *)oiph + ip_hdrlen(oskb);
+ otcplen = oskb->len - ip_hdrlen(oskb);
+
+ /* No replies for RST or FIN */
+ if (otcph->rst || otcph->fin)
+ return;
+
+ /* No reply to !SYN,!ACK. Rate-limit replies to !SYN,ACKs */
+ if (!otcph->syn && (!otcph->ack || !xrlim_allow(&ort->u.dst, 1*HZ)))
+ return;
+
+ /* Check checksum. */
+ if (tcp_v4_check(otcplen, oiph->saddr, oiph->daddr,
+ csum_partial((char *)otcph, otcplen, 0)) != 0)
+ return;
+
+ /*
+ * Copy skb (even if skb is about to be dropped, we cannot just
+ * clone it because there may be other things, such as tcpdump,
+ * interested in it)
+ */
+ nskb = skb_copy(oskb, GFP_ATOMIC);
+ if (nskb == NULL)
+ return;
+
+ niph = ip_hdr(nskb);
+
+ /* This packet will not be the same as the other: clear nf fields */
+ nf_conntrack_put(nskb->nfct);
+ nskb->nfct = NULL;
+#ifdef CONFIG_NETFILTER_DEBUG
+ nskb->nf_debug = 0;
+#endif
+
+ ntcph = (void *)niph + ip_hdrlen(nskb);
+
+ /* Truncate to length (no data) */
+ ntcph->doff = sizeof(struct tcphdr)/4;
+ skb_trim(nskb, ip_hdrlen(nskb) + sizeof(struct tcphdr));
+ niph->tot_len = htons(nskb->len);
+
+ /* Swap source and dest */
+ niph->daddr = xchg(&niph->saddr, niph->daddr);
+ tmp = ntcph->source;
+ ntcph->source = ntcph->dest;
+ ntcph->dest = tmp;
+
+ /* Use supplied sequence number or make a new one */
+ ntcph->seq = otcph->ack ? otcph->ack_seq
+ : htonl(secure_tcp_sequence_number(niph->saddr,
+ niph->daddr,
+ ntcph->source,
+ ntcph->dest));
+
+ /* Our SYN-ACKs must have a >0 window */
+ ntcph->window = (otcph->syn && !otcph->ack) ? htons(5) : 0;
+
+ ntcph->urg_ptr = 0;
+
+ /* Reset flags */
+ ((u_int8_t *)ntcph)[13] = 0;
+
+ if (otcph->syn && otcph->ack) {
+ ntcph->rst = 1;
+ ntcph->ack_seq = 0;
+ } else {
+ ntcph->syn = otcph->syn;
+ ntcph->ack = 1;
+ ntcph->ack_seq = htonl(ntohl(otcph->seq) + otcph->syn);
+ }
+
+ /* Adjust TCP checksum */
+ ntcph->check = 0;
+ ntcph->check = tcp_v4_check(sizeof(struct tcphdr),
+ niph->saddr,
+ niph->daddr,
+ csum_partial((char *)ntcph,
+ sizeof(struct tcphdr), 0));
+
+ fl.nl_u.ip4_u.daddr = niph->daddr;
+ fl.nl_u.ip4_u.saddr = local ? niph->saddr : 0;
+ fl.nl_u.ip4_u.tos = RT_TOS(niph->tos) | RTO_CONN;
+ fl.oif = 0;
+
+ if (ip_route_output_key(&nrt, &fl))
+ goto free_nskb;
+
+ dst_release(nskb->dst);
+ nskb->dst = &nrt->u.dst;
+
+ /* Adjust IP TTL */
+ niph->ttl = dst_metric(nskb->dst, RTAX_HOPLIMIT);
+
+ /* Set DF, id = 0 */
+ niph->frag_off = htons(IP_DF);
+ niph->id = 0;
+
+ /* Adjust IP checksum */
+ niph->check = 0;
+ niph->check = ip_fast_csum((unsigned char *)niph, niph->ihl);
+
+ /* "Never happens" */
+ if (nskb->len > dst_mtu(nskb->dst))
+ goto free_nskb;
+
+ ip_direct_send(nskb);
+ return;
+
+ free_nskb:
+ kfree_skb(nskb);
+}
+
+static unsigned int xt_tarpit_target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const struct xt_target *target,
+ const void *targinfo)
+{
+ const struct sk_buff *skb = *pskb;
+ const struct iphdr *iph = ip_hdr(skb);
+ struct rtable *rt = (void *)skb->dst;
+
+ /* Do we have an input route cache entry? */
+ if (rt == NULL)
+ return NF_DROP;
+
+ /* No replies to physical multicast/broadcast */
+ if (skb->pkt_type != PACKET_HOST && skb->pkt_type != PACKET_OTHERHOST)
+ return NF_DROP;
+
+ /* Now check at the protocol level */
+ if (rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
+ return NF_DROP;
+
+ /*
+ * Our naive response construction does not deal with IP
+ * options, and probably should not try.
+ */
+ if (iph->ihl * 4 != sizeof(struct iphdr))
+ return NF_DROP;
+
+ /* We are not interested in fragments */
+ if (iph->frag_off & htons(IP_OFFSET))
+ return NF_DROP;
+
+ tarpit_tcp(skb, rt, hooknum == NF_IP_LOCAL_IN);
+ return NF_DROP;
+}
+
+static int xt_tarpit_check(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
+{
+ bool invalid;
+
+ if (strcmp(tablename, "raw") == 0 && hook_mask == NF_IP_PRE_ROUTING)
+ return true;
+ if (strcmp(tablename, "filter") != 0)
+ return false;
+ invalid = hook_mask & ~((1 << NF_IP_LOCAL_IN) | (1 << NF_IP_FORWARD));
+ return !invalid;
+}
+
+static struct xt_target xt_tarpit_reg = {
+ .name = "TARPIT",
+ .family = AF_INET,
+ .proto = IPPROTO_TCP,
+ .target = xt_tarpit_target,
+ .checkentry = xt_tarpit_check,
+ .me = THIS_MODULE,
+};
+
+static int __init xt_tarpit_init(void)
+{
+ return xt_register_target(&xt_tarpit_reg);
+}
+
+static void __exit xt_tarpit_exit(void)
+{
+ xt_unregister_target(&xt_tarpit_reg);
+}
+
+module_init(xt_tarpit_init);
+module_exit(xt_tarpit_exit);
+MODULE_DESCRIPTION("netfilter xt_TARPIT target module");
+MODULE_AUTHOR("Jan Engelhardt <jengelh@gmx.de>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_TARPIT");

58
target/linux/generic-2.6/patches/999-backport_ip_hdr_and_friends.patch Normal file
View File

@ -0,0 +1,58 @@
Index: linux-2.6.21.7/include/linux/ip.h
===================================================================
--- linux-2.6.21.7.orig/include/linux/ip.h
+++ linux-2.6.21.7/include/linux/ip.h
@@ -104,6 +104,16 @@ struct iphdr {
/*The options start here. */
};
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
+{
+ return (struct iphdr *)skb_network_header(skb);
+}
+
+#endif
+
struct ip_auth_hdr {
__u8 nexthdr;
__u8 hdrlen; /* This one is measured in 32 bit units! */
Index: linux-2.6.21.7/include/linux/skbuff.h
===================================================================
--- linux-2.6.21.7.orig/include/linux/skbuff.h
+++ linux-2.6.21.7/include/linux/skbuff.h
@@ -966,6 +966,16 @@ static inline void skb_reserve(struct sk
skb->tail += len;
}
+static inline unsigned char *skb_network_header(const struct sk_buff *skb)
+{
+ return skb->nh.raw;
+}
+
+static inline unsigned char *skb_tail_pointer(const struct sk_buff *skb)
+{
+ return skb->tail;
+}
+
/*
* CPUs often take a performance hit when accessing unaligned memory
* locations. The actual performance hit varies, it can be small if the
Index: linux-2.6.21.7/include/net/ip.h
===================================================================
--- linux-2.6.21.7.orig/include/net/ip.h
+++ linux-2.6.21.7/include/net/ip.h
@@ -43,6 +43,11 @@ struct inet_skb_parm
#define IPSKB_REROUTED 16
};
+static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
+{
+ return ip_hdr(skb)->ihl * 4;
+}
+
struct ipcm_cookie
{
__be32 addr;